Also added QSetting value names to common.h
Work is halfway on both translations and .ui files.
I added a very quick and rough finnish translation.
The program now requires the translation files to be created before running
that can be done with lrelease gui.pro.
To compile the whole GUI one must do the following
cd gui
qmake
lrelease gui.pro
make
Items are now hidden from the tree and the tree is not recreated everytime it is refreshed.
Also added test.cpp as a sample data for GUI testing.
Added Check all and uncheck all buttons to menu to show/hide all errors more easily.