Enable translation for additional strings

Closes #520
Add localize for non-routed plugin controller actions

Closes #524
Fix: Create resized directory when it does not exists

Closes #522
Unindent doc block following CS
ImageHelper: Method extraction for readability + DRYness

- Docblock fixes
- Variable renames
- New protected methods: _resize() and _setupTransparency()
Merge branch '2.0-image-helper'

* 2.0-image-helper:
  ImageHelper: Method extraction for readability + DRYness
  Unindent doc block following CS
  Fix: Create resized directory when it does not exists
Cache results of linkStringToArray

Closes #350
Fix: Element display Roles uses incorrect class in its input
CroogoHtmlHelper: Configurable icon classes

This would make it easier when upgrading fontAwesome in the future
Since 'large' is already default, remove it from menu config
Merge branch '2.0-icons'

* 2.0-icons:
  Since 'large' is already default, remove it from menu config
  CroogoHtmlHelper: Configurable icon classes
admin.js: Extract Admin.navigation() method into a separate file

Admin themes might provide its own navigation handler.  Move it out
so we can still reuse admin.js.
Adapt helpers to include btn-default class

This will allow easier upgrade path in the future
Use CroogoHelper::adminScript()
acl_permissions.js: Split tabSwitcher into two methods
Extract pagination into an element
Move default setup to CroogoTheme and reorder key hierarchy in theme.json

Theme settings are now stored under a specific `settings` node.
Enable configuring FormHelper's inputDefaults from theme.json
Configurable css classes in theme.json

- Configurations are read during application startup and sent to view as
  $themeSettings
- When `inputDefaults.class` is not specified theme.json helper settings,
  FormHelper will reuse `settings.css.formInput`
- New helper method: LayoutHelper::cssClass() to retrieve configured values
Adapt helpers to use css class configured in theme.json