Adding ability to save QTwindow geometry to config solving #1245

+ Load window geometry from config added to constructor
+ Save window geometry to config added to destructor
+ Added an opt out boolean to allow for saving / not saving geometry
+ Consolidated the Minimize settings into the "UI_Settings" in config
+ Code to initialise config values.

Amended for code style by Adam Honse <calcprogrammer1@gmail.com>
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