yentl/modelverse_GUI

Yentl Van Tendeloo 373027b213 Various bugfixes in GUI		7 lat temu
..
canvas	373027b213 Various bugfixes in GUI	7 lat temu
toolbar	5335a7e3f0 Added exception handling to the toolbar	7 lat temu
widgets	6d197f9e4b Working nice error logger	7 lat temu
window	25fe1b53c7 Fixed rename of name of defined attribute	7 lat temu
main_app.xml	6d197f9e4b Working nice error logger	7 lat temu