Handle undefined text area values

Check to see if a text area's `val` is defined before trying to call
`replace()` on it.
Fix milestone link in issue. Closes #174 (gitlab.com).
Use button type=submit instead of input.
Fix identation.
transfer_service_spec: cleanup, merge common code, check against nil

- replace creation of group2 with the use of group without add_owner(user)
- fold TransferService calls into new test function transfer_project
  - remove currently not used (and not working) gitlab_shell stub
    (will submit testcase simulating failure in gitlab_shell separately)
- add checks against not be_nil (result.should be_false passes even if nil)
Dry admin logs.
fonts: Added "DejaVu Sans Mono" and "Ubuntu Mono"

Everything is better than "Courier New" ...
support latest firefox esr release
Display renamed files in diff views

Show both the old and new filenames when viewing the diff for a renamed
file.
Add option to keep repo on project delete

Update the project API controller to use `Projects::DestroyService`
instead of calling `Project#destroy` directly.

Also add an optional parameter, `:keep_repo`, that allows a project to
be deleted without deleting the repository, wiki, and satellite from
disk.
Remove unneeded app/finders config.autoload path

Every directory under app/ is searched by default
Make new and edit file submit more uniform
Enable markdown pipeline filters from inside gitlab.
Failing test for apostrophe at the end of user mention on project with issue iid 39.
Replace apostrophe with right single quote to avoid markdown interpretation as issue 39.
Bump gitlab-grit version with improved timeout feature

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Snippets: public/internal/private
Add a test for apostrophe in code blocks.
Merge branch 'bump-grit' into 'master'

Bump grit

Fixes gitlab/grit#7

See merge request !1166
Merge branch 't1254-snippets-refactoring' into 'master'

Snippets need to be either public/internal/private

See merge request !1162