Refs #5 - Progress to Filter widget
Merge pull request #538 from marininicola/develop

Add italian translation to the backend and fix a bug in the backend toolbar
Use correct flag for Sweden, it was previously set as the El Salvador flag.
Use large flags for retina displays.
Merge pull request #539 from paulwilde/develop

Use correct flag for Swedish and larger versions for Retina displays.
More translation strings.
Fix argument name.
Escape unescaped translations. Add trans() function during output for the Balloon and Widget Selector.
Merge pull request #541 from paulwilde/develop

More translation strings.
Progress to filter widget, added animation less stylesheet
Throw ApplicationException when AJAX handler not found
Escape all the translated strings
Refs #543 - Translate the fallback report widget title should the user not set their own
Fixes #543 - default fallback title isn't being translated inside the modal
Add getTwig controller method
Finish up basic Filter implementation
Merge pull request #544 from Flynsarmy/getTwigMethod

Add getTwig controller method
Minor
Merge pull request #545 from marininicola/develop

Fix an issue when searching an asset in CMS backend
Implementing the treeview element