Fix translation file / build

Change-Id: I6b48de43028b75a1e477d90334fecb2e7bf30835
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
QmlDesigner.PropertyEditor: Adding lookup rules for different versions

The property editor will now try to find a pane for the specific
version first.

Example:

If we have a QtQuick.Item 2.0

We first look for: QtQuick/ItemPane_2_0.qml
And then fallback to: QtQuick/ItemPane.qml

The same does apply for the specifics file.

Task-number: QTCREATORBUG-8681
Change-Id: If210998780073295f168169d2fc424288d3bd6a0
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>
QmlDesigner.PropertyEditor: use F3 to reload property panes

F3 is still free in Qt Creator

Change-Id: I0588e467a5f7c60ee621c472614be6003d5fe2dd
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>
QmlDesigner.PropertyEditor: Add generic QtObject pane

This patch adds a generic property editor pane for QtObject.
Objects derived from QtObject get an auto generated property editor
for their additional properties or can use the specfics mechanism
to define a custom one.

Task-number: QTCREATORBUG-9451
Change-Id: I730b19e4e417f3f4d4ee6cdf2b3f3ef32f8c1f94
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>
Merge remote-tracking branch 'origin/2.7' into 2.8