GH-165: added tooltip to actions, implemented discard
GH-165: added tooltip to actions, implemented discard

Signed-off-by: Sven Efftinge <4d4cca3ab9a300a7bfb926d62ac5a20be54bf033@typefox.io>

hexa00/theia,hexa00/theia,epatpol/theia-1,epatpol/theia-1,epatpol/theia-1