New project button with filter in header.
Fixes#3943

See merge request !2165
Fix headers of milestone and snippet show pages
Fix layout, and move "Edit" button to very right just like issue/MR.
Before:


After:


cc @skyruler
cc @rspeicher 8.3 please!
See merge request !2104
Fix right margin of control list
Before:

After:

See merge request !2114
Make profile navigation full wide
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
## Before

## After

See merge request !2076
This adds a new feature to `Flash` that allows to pin it after a
specified selector. This removes a fixed position from such award-emoji
alert, and makes it responsive by design of selector that this alert is
pinned to.
Closes#3996
Build related UI fixes
## Before

## After

See merge request !2015
Fix problems with award-emoji-only comment
This fixes a conflict between note with only a single emoji in content
and award-emojis mechanisms.
Closes#3734
cc @vsizov
See merge request !1936
UI: New Project form tweaks
Depends on !1953
See the commits for more details, the messages mostly speak for themselves.
Before:

After:

See merge request !1964
UI: Issuable filter tweaks
Depends on !1953
See the commits for more details, the messages mostly speak for themselves.
# Highlights
## Filter bar
Before:

After:

## Bulk edit bar
Before:

After:

See merge request !1963