Documentation updates

docs/Keyboard_Controls.md

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+# Keyboard Control
+
+It is possible to execute nearly every function in Apple II DeskTop
+with the keyboard.
+
+△ = Open Apple
+
+▲ = Solid Apple
+
+## Windows
+
+* △-W - Activate window; Left/Right Arrows to navigate
+* △-G - Resize window; Arrows to resize, Return to finish
+* △-M - Move window; Arrows to move, Return to finish
+* △-X - Scroll contents; Arrows to scroll, Esc or Return when done
+
+## Icons
+
+* △-H - Highlight icon; Left/Right Arrows to navigate, Esc or Return when done
+* △-A - Select all icons
+
+## Menus
+
+* Escape - menu mode; Arrows to navigate, Return to select
+
+## Shortcuts
+
+__File Menu__
+* △-F - New Folder
+* △-O - Open
+* △-C - Close
+* △-B - Close All
+* △-A - Select All
+* △-Y - Copy a File
+* △-D - Delete a File
+* △-E - Eject
+* △-Q - Quit
+
+__View Menu__
+* △-J - View By Icon
+* △-N - View By Name
+* △-T - View By Date
+* △-K - View By Size
+* △-L - View By Type
+
+__Special Menu__
+* △-S - Format a Disk
+* △-Z - Erase a Disk
+* △-I - Get Info
+
+__Selector Menu__
+* △-0 - Run Selector
+* △-1 ... △-9 - Selector Entries