Only resize received screenshot if it's greater than 200px width
Remove log statement that produces too much noise
Refactor if-else out
Replace avinfo.exe with mediainfo.exe
Replace if-else with const variable
Add missing {} from if statement
Implement finished() signal on frame generator

Implementing the finished() signal on frame generator lets us separate
checking if the generator is finished in MainWindow::frameReceived
into a separate member function
Refactor screenshot container full check to separate member function

The container now emits a signal called full() which is connected
to a slot member function
Simplify jumping to last generated (received) frame
Only pause frame generator after screenshot limit is reached if there's more frames
Refactor if statements
Remove unused code