Invalidate cache for builds badge

This fixes cache issue with badges (we should not cache badge images).

Closes #13982

See merge request !3086

Closes #13982

Increase the notes polling timeout over time

Originally by @roperzh at https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/2821

Fixes #13300 

See merge request !3071

SSH keys settings

Closes #13860

See merge request !3034

Prior, we were double-checking `@keys.any?`, and unnecessarily assigning
`is_admin` in a view where it wasn't needed.

Button transparent colours

Closes #13860

Update spring to 1.6.4 to fix support for Bundler 1.11

See merge request !3083

A file called notes is loaded every ~15 seconds which checks for
updates to content on the page. This commit increases the polling
timeout over time (15, 30, 60, 120 seconds) and resets
it to 15 seconds if the AJAX call returns new notes

Fixes issue #13300

Password settings page

Closes #13858 

![](https://gitlab.com/gitlab-org/gitlab-ce/uploads/ebb9b67d69daa8872d79626b85f99b52/password-settings.png)

See merge request !3033

Lazy diffs

Needs https://gitlab.com/gitlab-org/gitlab_git/merge_requests/65

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/10785

-   Use Gitlab::Git::DiffCollection which limits the result set size.
    This avoids loading unnecessary data from Git/SQL into memory.
-   Remove left-over Grit timeout handling code.
-   Use Gitlab::Git::Count.lines to count lines in strings.
-   Use more iterators.

See merge request !2705

Correcly updates the status of the comment buttons on reload

Closes #5534 

![comment-reload](/uploads/413df488222cacfb02a5ea7592abfd11/comment-reload.gif)

See merge request !3081

Emails settings

Closes #13857 

![](https://gitlab.com/gitlab-org/gitlab-ce/uploads/4a87ee4b0abf970c1fbb5e8a8c02740c/email-settings.png)

See merge request !3032

Include pagination for other than projects search

Pagination for projects results is already added on views/shared/projects/_list.html.haml

Fixes #13933

See merge request !3056

Closes #5534

Improve UI for explore projects page

Move visibility and tags filter inline with navigation links
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

cc @jschatz1 @skyruler 

See merge request !3079

[ci skip]

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Flush repository caches before renaming projects

This should hopefully solve gitlab-org/gitlab-ce#13790. Once I know the exact steps to reproduce the problem I should be able to confirm this.

cc @dblessing @inem 

See merge request !2974

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

This reverts commit 617bb109.

This reverts commit 70d64552.

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>