The compiler does not like 128 if's in a function.

Oxygen does some interesting tweaks with content
margins and event filters to draw dock widgets.
This had to be explicitly disabled in order to look
ok.

Implementations are mostly missing.

Additionally, hiding of debugger menu entries was done as most of
them are irrelevant for QML debugging.

Happened for

import Qt 4.6
Flipable {
  Rectangle {}
}

This reverts commit f4248e2c.
It's not needed anymore as code using it is gone.

Reviewed-by: Erik Verbruggen

However, it still re-reads for each use of Link. Needs to be optimized.

Reviewed-by: Roberto Raggi

Prevents flicker when clicking the parent settings dialog.

It has nothing to do with fakevim.

- this removes qml warnings on construction and destruction of the item
  library

- also removed tabs from Qml files

Task-Nr: QTCREATORBUG-572