Add styles for headings h1 h2 h3 h4

- added styles for headlines h1, h2, h3, h4
Fix action menu positioning
Fix action menu positioning
Merge branch 'dev-angular' of github.com:opf/openproject into dev-angular
Restrict position absolute to context menus
Remove former context menu styles in favor of new components (WIP)


FIXME Adapt the right-to-left css rules to the new components /cc @zzmedia
Hiding dropdown menu when toggling display sums.
Merge branch 'dev-angular' of github.com:opf/openproject into dev-angular
Rename available column-loading methods in QueryService
Memoize availableUnusedColumn in angular query service
Merge branch 'dev-angular' of github.com:opf/openproject into dev-angular
Move WorkPackagesTableHelper dependency over to wp table service
Fix typo (and the CI)
Close the drop downs on any click event ...


TODO Implement one of the following approaches (or anything else)

	- use ng context menu and drop the options drop down component
	- prettify open and close dialogs between handlers and drop downs,
		e.g. by nesting and sharing a controller
Wired up share modal to query is_public
removed unsed method on query.js.
Remove unused coffee-rails dependency from Gemfile

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Do not require uglifier in Gemfile

uglifier is not needed at application runtime, only for asset
precompilation.

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Ensure Caret.js, not Caret.coffee is precompiled

Otherwise CoffeeScript dependencies would once again be required
(coffee-rails was removed in 23c09561)-

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Temporarily disable digest assets in production

Rails 4's asset pipeline only pre-compiles assets with digest. This
causes two issues:
 - `font-url` helper in Sass is not referencing assets with the
   digest. This may be a manifestation of the same problem worked-
   around in b0f758fc.
 - various plugins appear not to be using the `asset_path` helpers.

Signed-off-by: Alex Coles <alex@alexbcoles.com>