Minor update to close #1318

Exit select mode when the last selected app is unselected
Updated changelog and read me
Fixed dark theme usage list

Closes #1331
Merge pull request #1329 from paour/patch-1

Minor update to close #1318
Even easier multiple select, thanks @paour

Resf #1318
Updated FAQ
Updated similar solutions
Added three test applications to contributing section
Updated changelog
Annotations for the IPC category

Refs #838
Updated FAQ
Fix FAQ numbering