Add Qml component “Frame“.

The Frame component is an ApplicationWindow with its own title bar. The
title bar is half transparent (25%) and provides a minimize, a maximize
and a close button. The “toolBar“ has been overwritten and sets the
component to show in the right angle of the title bar. The Frame is
movable (own implementation) and resizable (window manager).

The Collection does not provide it search field anymore. To search the
current model, use following code:

    collection.model.search = new RegExp(text, "i")

The CollectionMenu component has been removed. Will be mocked-up and
refactored in future versions. Basically, we want a ListView component
which queries the local database based on each item's “query“ property.

The SearchFieldStyle user-interface component has been modified to be
displayed in the Frame's title bar.