Merge branch 'scroll-sidebar' into 'master'

Scroll sidebar

On small screens content of sidebar does not fit. This merge request makes sidebar scrollable which makes it usable for tablets and small laptops.

This merge request has no screenshot because it brings no visual change. Its about action.

cc @darby @JobV

See merge request !972

app/assets/stylesheets/generic/sidebar.scss

@@ -2,6 +2,8 @@
   .sidebar-wrapper {
     position: fixed;
     top: 0;
+    bottom: 0;
+    overflow-y: scroll;
     left: 0;
     height: 100%;
     transition-duration: .3s;
@@ -21,8 +23,9 @@
 }
 .nav-sidebar {
+  margin-top: 29 + $header-height;
+  margin-bottom: 50px;
   transition-duration: .3s;
-  margin: 0;
   list-style: none;
   overflow: hidden;
@@ -39,7 +42,7 @@
     }
     a {
-      padding: 7px 15px;
+      padding: 8px 15px;
       font-size: 13px;
       line-height: 18px;
       color: $gray;
@@ -88,9 +91,6 @@
     width: $sidebar_width;
     .nav-sidebar {
-      margin-top: 29px;
-      position: fixed;
-      top: $header-height;
       width: $sidebar_width;
     }
@@ -114,9 +114,6 @@
     width: $sidebar_collapsed_width;
     .nav-sidebar {
-      margin-top: 29px;
-      position: fixed;
-      top: $header-height;
       width: $sidebar_collapsed_width;
       li a {
@@ -178,7 +175,7 @@
 }
 .sidebar-user {
-  position: absolute;
+  position: fixed;
   bottom: 0;
   width: $sidebar_width;
   padding: 10px;

app/assets/stylesheets/themes/gitlab-theme.scss

@@ -38,6 +38,7 @@
       border-right: 1px solid $color-darker;
       .sidebar-user {
+        background: $color-darker;
         color: $color-light;
         &:hover {