I did this together with Christiaan Janssen

Reviewed by: Christiaan Janssen

When changing the language, the sidebar items would break because
their localized window titles were used for storing the settings. Now,
id's are used.

Reviewed-by: con

Reviewed-by: hjk

Reviewed-by: kkoehne

Reviewed-by: Marco Bubke

Discussed-with: hjk

Do it in the destructor instead.

Reviewed-by: hjk

Reviewed-by: Jens Bache-Wiig

Reviewed by: Kai Koehne

* Make sure we only change our own urls inside that function
* QDesktopService::setUrlHandler expects the target slot to take a QUrl

Reviewed-by: ck

Reviewed-by: ck

The Navigator and the Property Editor now show the same error
message for invalid nodes

See: BAUHAUS-611

* Fixed an issue with text eliding on combo boxes
* Fixed placement of arrow on elided comboboxes

Task-number: QTCREATORBUG-1278

Task-number: QTCREATORBUG-1288

I made the buttons uniformly sized based on the largest of the
two translated strings.

Task-number: QTCREATORBUG-1286
Reviewed-by: ogoffart

Reviewed-by: Jens Bache-Wiig

Reviewed-by: kkoehne

Task-Number: BAUHAUS-636
Reviewed-by: kkoehne

objects

Reviewed-by: kkoehne

Reviewed-by: kkoehne

The old was wrong in the assumption that the pointer is allways a
variant.

Reviewed-by: kkoehne

the file component

Reviewed-by: kkoehne

This is fixing many crashes but maybe not anymore in line with the qml
viewer.

Task-Number: BAUHAUS-622
Reviewed-by: kkoehne