Cherrypicked from branch fix/remove_layout_tables_4112

Implemented changes to the work packges index view which are now in the work packages options angular template.
Cherrypicked from branch fix/missing_labels_4118.

Accessibilty for timelines zoom select and outlines select.
Cherrypicked from branch fix/icon_link_table_comprehensibility.

Timelines add work package icon has span with hidden text.
Fixed typo in locale names in template.
Added in missing hidden-for-sighted labels in filters and columns templates.

Could still be more... also locales files are a mess:/
Merge branch 'feature/ui-component-table-widgets-merged' into feature/ui-component-table-widgets-merged-accessibility-changes

Conflicts:
	public/templates/work_packages/query_columns.html
	public/templates/work_packages/work_packages_options.html
Fix work package options style
Make option toggle title more accessible, add German translations
Merge pull request #988 from opf/feature/ui-component-table-widgets-merged-accessibility-changes

Feature/ui component table widgets merged accessibility changes