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These buttons are not in a regular layout so they were not being resized
down to the available size. Just specify a fixed height on all levels
now, and make sure it is consistent.

Double testing, only enable the codeblock when tests are found to be run,
also, only send the quit message if there are tests found to be run.

Changed around the way the background is drawn on the crumble path, so
that the background extends below the filter line edit.

Reviewed-by: Kai Koehne

Move tooltip-request handling from DebuggerPlugin into
DebuggerToolTipManager.

Request tooltip only if position changed and close
standard tooltip on success.

Requested-By: hjk

Task-number: QTCREATORBUG-3795

dff->diff.

Started out in assembly mode, regression introduced by
a9982cac
(Debugger[CDB]: Enable engine restart)

using CDB's KnownStruct-handling.

This one has the common debugger actions as well as the QML Observer
specific part. This makes sure those actions are generally available and
not only from the QML Observer dock widget.

The filter in the tool bar should still be moved back.
Reviewed-by: Christiaan Janssen <christiaan.janssen@nokia.com>

That should make the possibility to use it as input more obvious.

Reviewed-by: Friedemann Kleint

Reviewed-by: Kai Koehne

Reviewed-by: Alessandro Portale

Add a method returning the difference between two Environments.

Reviewed-by: dt

* Prefer command line arguments on session management to
  settings.

Reviewed-by: thorbjorn

Task-Nr: QTCREATORBUG-3740

Task-number: QTCREATORBUG-3661

No user-visible changes.

Mutually exclusive radio buttons could be toggled independently.