GL: add getWidgetHandle
GL: add tests of used extensions
Optimize _addSelection plotting.
Legend menu working on the McaWindow.
Add doc string.
Work to properly implement a spectral mask.
Make sure a copy of the image is used because the first image got corrupted.
Update title.
Correct indentation.
Better update of the graph title.
Reduce the number of multiplications.
Ignore not handled keywords.
ctools: add min/max in C
ctools: fix build
setup.py: add ctools/minMax
ctools: update generated C code
GL: typo clic->click
GL backend: send right clic event when zoom stack is empty
Merge remote-tracking branch 'upstream/master'