Function "fishing"

To use this function, you the to be ready on fishing state, and the Start button is visible clearly on the screen

Supported flags:

• --exit=X means will exit after X secs if not completed, no matter how many loop remaining. Usage: ./fishing.sh 20 --exit=1800 means will stop fishing after fishing 20 times or after 1800 seconds (30m), depends which condition completed first
• Global flags

Test result

OS	Fishing on Mini-client 800x520	Fishing on Steam 800x480
Ubuntu 18.04 (development environment)	Work perfectly	N/A
Windows 10 x64	Work perfectly	Basically good
Windows 7 x64 (on Virtual Box)	Work perfectly	Basically good
MacOS 10.14 High Sierra	Not work	Not work