#4 - Added icon for "RollUp"
#4: "RollUp"-Functionality for EDE-GUI
Merge branch 'feature/#4-EDE-RolledUp' into develop
[P] PrepareRelease EDE 0.5.5

[+] #4: Toggling"RollUp" for current window
Merge branch 'preparerelease/0.5.6' into develop