Added X-GitLab-... headers to emails from CI and Email On Push services
Fixes#2098
This adds the 'X-GitLab-Project', 'X-GitLab-Project-Id' and
'X-GitLab-Project-Path' headers to emails from CI and Email On Push in a way
that it is done currently for merge requests and issues emails.
Additionally, CI emails will have 'X-GitLab-Build-Status' header with either
'fail' or 'success'.
Emails from Email On Push will include 'X-Gitlab-Author' header containing the
username of user who did the push.
See merge request !2159
Starring project only increases star count
This is instead of increasing star & fork count
Fixes#11396

cc. @jschatz1
See merge request !2504
Greatly improve external_issue_tracker performance
See 3d41133d48f6522b8755bb91b804864e8e520871 for all the details. As an aside, this commit contains a set of migrations that will introduce downtime as they add a column with a default value which in turn locks the entire table (at least on PostgreSQL).
See merge request !2498
This greatly improves the performance of Project#external_issue_tracker
by moving most of the fields queried in Ruby to the database and letting
the database handle all logic. Prior to this change the process of
finding an external issue tracker was along the lines of the following:
1. Load all project services into memory.
2. Reduce the list to only services where "issue_tracker?" returns true
3. Reduce the list from step 2 to service where "default?" returns false
4. Find the first service where "activated?" returns true
This has to two big problems:
1. Loading all services into memory only to reduce the list down to a
single item later on is a waste of memory (and slow timing wise).
2. Calling Array#select followed by Array#reject followed by Array#find
allocates extra objects when this really isn't needed.
To work around this the following service fields have been moved to the
database (instead of being hardcoded):
* category
* default
This in turn means we can get the external issue tracker using the
following query:
SELECT *
FROM services
WHERE active IS TRUE
AND default IS FALSE
AND category = 'issue_tracker'
AND project_id = XXX
LIMIT 1
This coupled with memoizing the result (just as before this commit)
greatly reduces the time it takes for Project#external_issue_tracker to
complete. The exact reduction depends on one's environment, but locally
the execution time is reduced from roughly 230 ms to only 2 ms (= a
reduction of almost 180x).
Fixesgitlab-org/gitlab-ce#10771
Fix double request issue in artifacts browser
This fixed problem with double propagation when clicking a link that lies inside tr with clicked event attached.
See merge request !2496
Fix positioning issues with browse files button
Issue is that in Firefox clipboard is blocking the browse files
from moving all the way to the right.
Move clipboard up 1px into -1px to unblock "browse files"
SS from firefox:

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/10849
See merge request !2489
Search title gets clipped vertically.
Fixed by adding height to search title css.
**Before:**

**After:**

See merge request !2460
Reduce margin to fit dropdowns

Fixes#10747
See merge request !2492