Fixes grammatical consistency and small changes

This commit adds consistency to small things like periods, commas,
etc. Also gives additional information to buttons and headers.
Fixes #2002, #2005, #2003

app/views/profiles/accounts/show.html.haml

 %h3.page-title
-  Account settings
+  Account Settings
 %p.light
   You can change your username and private token here.
   - if current_user.ldap_user?
@@ -10,7 +10,7 @@
 .account-page
   %fieldset.update-token
     %legend
-      Private token
+      Reset Private token
     %div
       = form_for @user, url: reset_private_token_profile_path, method: :put do |f|
         .data
@@ -25,7 +25,7 @@
             - if current_user.private_token
               = text_field_tag "token", current_user.private_token, class: "form-control"
               %div
-                = f.submit 'Reset', data: { confirm: "Are you sure?" }, class: "btn btn-primary btn-build-token"
+                = f.submit 'Reset private token', data: { confirm: "Are you sure?" }, class: "btn btn-primary btn-build-token"
             - else
               %span You don`t have one yet. Click generate to fix it.
               = f.submit 'Generate', class: "btn success btn-build-token"
@@ -43,7 +43,7 @@
   - if show_profile_username_tab?
     %fieldset.update-username
       %legend
-        Username
+        Change Username
       = form_for @user, url: update_username_profile_path,  method: :put, remote: true do |f|
         %p
           Changing your username will change path to all personal projects!

app/views/profiles/applications.html.haml

 %h3.page-title
-  OAuth2
+  Application Settings
+%p.light
+  OAuth2 protocol settings below.
 %fieldset.oauth-applications
   %legend Your applications

app/views/profiles/design.html.haml

 %h3.page-title
-  My appearance settings
+  Design Settings
 %p.light
-  Appearance settings saved to your profile and available across all devices
+  Appearance settings will be saved to your profile and made available across all devices.
 %hr
 = form_for @user, url: profile_path, remote: true, method: :put do |f|

app/views/profiles/emails/index.html.haml

 %h3.page-title
-  My email addresses
+  Email Settings
 %p.light
   Your
   %b Primary Email
@@ -34,4 +34,4 @@
     .col-sm-10
       = f.text_field :email, class: 'form-control'
   .form-actions
-    = f.submit 'Add', class: 'btn btn-create'
+    = f.submit 'Add email address', class: 'btn btn-create'

app/views/profiles/groups/index.html.haml

 %h3.page-title
-  Group membership
+  Group Membership
   - if current_user.can_create_group?
     %span.pull-right
       = link_to new_group_path, class: "btn btn-new" do
         %i.fa.fa-plus
         New Group
 %p.light
-  Group members have access to all a group's projects
+  Group members have access to all group projects.
 %hr
 .panel.panel-default
   .panel-heading

app/views/profiles/history.html.haml

 %h3.page-title
-  Account history
+  My Account History
 %p.light
-  All events created by your account are listed here
+  All events created by your account are listed below.
 %hr
 .profile_history
   = render @events

app/views/profiles/keys/index.html.haml

 %h3.page-title
-  My SSH keys (#{@keys.count})
+  SSH Keys Settings
   .pull-right
     = link_to "Add SSH Key", new_profile_key_path, class: "btn btn-new"
 %p.light
-  SSH keys allow you to establish a secure connection between your computer and GitLab
+  My SSH keys: #{@keys.count}
   %br
   Before you can add an SSH key you need to
-  = link_to "generate it", help_page_path("ssh", "README")
+  = link_to "generate it.", help_page_path("ssh", "README")
 %hr
 = render 'key_table'

app/views/profiles/notifications/show.html.haml

 %h3.page-title
-  Notifications settings
+  Notifications Settings
 %p.light
   These are your global notification settings.
 %hr
-
 = form_for @user, url: profile_notifications_path, method: :put, html: { class: 'update-notifications form-horizontal global-notifications-form' } do |f|
   -if @user.errors.any?
     %div.alert.alert-danger
@@ -60,7 +59,7 @@
     %p
       You can also specify notification level per group or per project.
       %br
-      By default all projects and groups uses notification level set above.
+      By default, all projects and groups will use the notification level set above.
     %h4 Groups:
     %ul.bordered-list
       - @group_members.each do |users_group|
@@ -69,7 +68,7 @@
   .col-md-6
     %p
-      To specify notification level per project of a group you belong to,
+      To specify the notification level per project of a group you belong to,
       %br
       you need to be a member of the project itself, not only its group.
     %h4 Projects:

app/views/profiles/passwords/edit.html.haml

-%h3.page-title Password
+%h3.page-title Password Settings
 %p.light
   - if @user.password_automatically_set?
     Set your password.
@@ -12,7 +12,7 @@
         - unless @user.password_automatically_set?
           You must provide current password in order to change it.
           %br
-        After a successful password update you will be redirected to login page where you should login with your new password
+        After a successful password update, you will be redirected to the login page where you can log in with your new password.
       -if @user.errors.any?
         .alert.alert-danger
           %ul

app/views/profiles/show.html.haml

 %h3.page-title
-  Profile settings
+  Profile Settings
 %p.light
-  This information appears on your profile.
+  This information will appear on your profile.
   - if current_user.ldap_user?
     Some options are unavailable for LDAP accounts
 %hr