This reverts commit 13e37a3e.

This would happen when a todo already exists, the state of the button
wouldn't update after the ajax call

Added a button into the sidebar for issues & merge requests to allow users to manually create todo items

Closes #15045

Added sidebar
Removed elements not present in design

This reverts commit 3e991230.

# Conflicts:
#	app/models/project.rb

In the sidebar when there is a due date, a link to remove due date becomes visible

Closes #17392

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

This will also work better for when the title makes the buttons drop down a new line

Closes #14228

# Conflicts:
#	app/assets/javascripts/labels_select.js.coffee

Fixes issue with active button overlapping it

Closes #15243

These were being blocked by adblocks

Closes #15043

Fixes #13802

Added nice animations too.

Fixes violations of Shorthand.

Discussed in #14299.

[ci skip]

Fixed button hover color

Updated the spacing throughout the sidebar so that it fits better on smaller screens
Added more participants button

Closes #13353

Fixes violations of SpaceAfterPropertyColon.

Discussed in #14299.

[ci skip]

Use lowercase letters and shorthand values for HEX colors where
possible.

Discussed in #14299.

Unified the 'edited text' to be the same in descriptions and comments

Closes #5538

Closes #13764

Closes #13626