[Development] QFileSystemWatcher and Recursive Monitoring

[logic.cpp]

#1
Clarification of original post:

When I say "Making QFileSystemWatcher Recursive" I mean *adding* new functions
for recursive monitoring, such as "addPathRecursively()". I don't mean to
replace the current non-recursive functinality, which is very useful in its own
right (for "A" category use cases mentioned).