Make retrofit callbacks better by simplifiing them so that all errors are handled in the onAllError block.

* Remove the unnecessary `ATE.apply()` calls
* Replace all tags with the newer tag system

* Dividers are now drawn using `DividerItemDecoration` which leads to a
flatter view hierachy and removes the background overlap
* `CollapsingToolbarLayout` is now correctly themed based on the primary
color
* Chrome custom tab is now properly themed based on the primary color

* Integrate Settings activity in navigation drawer
* Implement basic Settings activity with theme section (dark/light
theme, primary color and accent color preferences)
* Add/Update new styles for ATE

Show Snackbar when text is copied instead of toast. Change some other Toasts to Snackbars. Fix palette to be more efficient.

Change project members fragment to have a footer button so that you can go straight to the associated project group.

Merge request activity. Form validation for URL during login. Improve timestamp from dates. Swap order of issue comments to match web. Update support libs.

Improve transition between user list and user detail. Fix the Group activity so that it allows overlay of the navigation view in the drawer like it does in the projects activity.

Update plugin. Make it where issue id title uses the internal id. Allow user to control if they are viewing open or closed issues, and allow user to control if they are viewing open, merged, closed, or all merge requests. Add activity transition between list of groups and group detail.

Fix issue with not being able to add user to group. Fix empty state for issues fragment. Remove ColorUtils in favor of Easel, the coolest library ever

Flesh out the Group activity. Get the projects for the group and add clear button to Search activity