convert debugger/ to new signal/slot syntax

REVIEW: 121040
convert documentation/ to new signal/slot syntax

REVIEW: 121039
Convert language/ to new signal slot syntax

REVIEW: 121038
convert project/ to new signal/slot syntax

REVIEW: 121041
Convert util/ to Qt5 signal/slot syntax

REVIEW: 121036
Address remaining comments from review 121038
convert vcs/ to new signal/slot syntax

REVIEW: 121042
Convert sublime/ to Qt5 signal/slot syntax

REVIEW: 121037
convert shell/ to new signal/slot syntax

REVIEW: 121043