Merge the ClutterText actor

Merge the ClutterText actor

Merge branch 'text-actor'

* text-actor: (108 commits)
  Re-align ClutterText header file
  [text] Fix cursor sizing
  Comments and whitespace fixes to ClutterText
  [docs] Add newly added :single-line-mode accessors
  Update the ignore file
  [tests] Add text field interactive test
  [text] Add single-line-mode to ClutterText
  [text] Fix the deletion actions
  [text] Use cached length when possible
  [tests] Add unit for the ClutterText:password-char property
  [docs] Update the Text section
  [text] Coalesce text visibility and password character
  Allow localizations to change the text direction
  Clean up the update_pango_context() function
  Pass the PangoContext, not the MainContext
  Revert the logic of the PangoContext check
  Remove the binding pool entry from the list
  Remove BindingPool::list_actions()
  Add ClutterActor::create_pango_context()
  Rename the PangoContext creation functions
  ...