Creation of new components from file-menu view must be redesigned

Controls component creation from the "File"-menu needs to be reworked, the output is currently heavily styled. Consider the following:

When new QML type is added by selecting "New file" ->  "Qt Quick Controls" => "Custom Button".

User is given a new ui.qml which has the transparency mask enabled and weird blue color pre-defined. 

User must first set canvas color to e.g. black

Default text "My Button" cannot be removed. If the user just selects the place holder text and removes it - it will re-surface when per-component view is seelcted again.