v1.5 - OSX Support - Code Cleanup - UI Update

-AssetManager now runs on OSX -not yet fully tested -expect problems with open-with
-Fonts and font sizes changed to be cross-platform compatible
-Reworked registry lookup largely removing redundant code
-Find Selected Item is now separated and resused
-All delete menu's now reuse the same delete function
-Reworked OpenAsset code/Removed redundant code
-Removed redundant code in MainWindow
-Removed redundant code in AddItem module
-Consolidated except statements in DatabaseConnect Module
-Ui Color Changes and bug fixes on custom colors, more variation