Clean up cmake configuration a bit, and pull down gtest when needed, no longer use a thirdparty subfolder
Add a ResInsight-tests target to run the unit tests
* Get rid of "ghost" windows on startup.
Removes hide all docking windows feature for now, to be replaced by a new implementation. Will probably break some tests due to this.
* Add system commands to test toolbar
* #9069 Summary Plot: Update only Y axis values during source stepping
* Reduce default brightness for ensemble summary curves
* Add a separate flag to control linking of time axis
* Make sure interactive zoom in plot is handled
* Move message dock window to right dock panel