get rid of most clazy warnings (https://github.com/KDE/clazy)
* range loop use refs
* qcolor ctor with ints
* missing Q_OBJECT macro
* use .constfirst instead of .first
enabled ccache for unix systems for fasterr recompiling
* if ccache is in path we use it now
* click message in status bar to show status view
* renamed status tab to output
* renamed status column to message
* fixed list not properly updating when using filters
* scroll to first row after clearing
Eberhard Graether