Using respond to instead

Make add single and add multi work properly.
Multiple inputs for multiselect

Adds deselect still a WIP.

Clarify LFS configuration

A user on Twitter was confused (rightfully so) because LFS admin docs suggest you must set a storage path. In fact, Omnibus defaults to a very sane location. Add a comment to the snippet outlining the default.

See merge request !3388

Fix cancel button on issuable edit form

See merge request !3392

Comments on confidential issues doesn't show in activity feed to non-members

Closes #14568 

See merge request !3375

Fixed issue with width of project select dropdown

Before:

![Screen_Shot_2016-03-24_at_13.42.53](/uploads/25580c45dc339f7f932f032ac2d10fba/Screen_Shot_2016-03-24_at_13.42.53.png)

![Screen_Shot_2016-03-24_at_13.43.04](/uploads/e4d1d4e332d27f14c980264bef9dc4d9/Screen_Shot_2016-03-24_at_13.43.04.png)

After:

![Screen_Shot_2016-03-24_at_13.42.38](/uploads/68b8e161d86b41849f9e8a1d9c8fd36c/Screen_Shot_2016-03-24_at_13.42.38.png)

![Screen_Shot_2016-03-24_at_13.43.13](/uploads/f3fe732bcd517efea3a1d7c761bb6a0e/Screen_Shot_2016-03-24_at_13.43.13.png)

See merge request !3386

Fixed bold in sidebar

![Screen_Shot_2016-03-23_at_12.01.54](/uploads/d50ae3426efcb2436b3debdd80073b2f/Screen_Shot_2016-03-23_at_12.01.54.png)

This is to go with https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/289

See merge request !3358

Shows password form when signed in with linked account

Closes #14379

Doing this to get the builds passing for !3325

See merge request !3381

Explain why ExclusiveLease has no #cancel

[ci skip]

See merge request !3383

Merge branch 'add-tooltip-to-issue-new-branch-button-with-create-branch-issue-title-123-14565' into 'master'

Add tooltip to new branch button

Closes #14565

See merge request !3380

[ci skip]

Closes #14379

Fix specs broken by !3270 and !3337.

To be fair:

- !3270 modifies CSS but `scss-lint` job was allowed to fail in the MR, while not allowed in `master`
- !3337 modifies HTML but the broken test was only in `master` at the time

/cc @alfredo1 @iamphill 

See merge request !3378