Closes #15063

yes -> true
no -> false
. frequent -> .frequent-emojis

Closes #18198

Closes #14227

Add a new application setting, after_sign_up_text. This is text to be
rendered as Markdown and shown on the 'almost there' page after a user
signs up, but before they've confirmed their account.

Tweak the styles for that page so that centered lists look reasonable.

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

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

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

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

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

Most noticable on the commit header

Added tests

When filtering by labels, a remove button appears next to each label. This then removes that label & refreshes the issuable filter form

Closes #15474

Fixes the bottom margin of .nav-controls > form (issues list search/filter form) so when a guest views on the field on mobile it is not squished against the issues list

Updated CHANGELOG

navigation tabs and navigation filter search will now stay on the same row until there is no space to

Removed unneeded media queries

Added a line to find the currently saved text and replace the markdown textarea text when cancelling

Updated CHANGELOG

Corrected the changes to store the markdown in a hidden input when edit starts and retrieve the original from that input when edit is cancelled

Replaced hidden input with form attribute