Fix errors mentioned by JSHint
Cleaned up duplicated code in column sorting modal.
Merge pull request #1405 from opf/fix/8449_fix_js_errors

[Fix] 8449 Fix JS errors
Add form elements to styleguide

- added new checkbox elements to the styleguide
specified full path to angular-truncate repo.
Merge branch 'dev' of github.com:opf/openproject into dev
Add a fix for the hide column context menu operation


TODO Unify context menu and options drop down components
Merge pull request #1411 from opf/bugfix/column-menu-hide

Add a fix for the hide column context menu operation
Merge branch 'dev' into feature/styleguide-form-elements
Added styled checkbox to query share modal.
Merge pull request #1413 from opf/feature/styleguide-form-elements

Add form elements to styleguide
Wiki: Increase font size and free space to make it more readable
Wiki: Increase padding around headings
Wiki: Improve list spacing
Wiki: Increase space between paragraphs