Created main file for GUI
Skeleton GUI app
Added KV file for app class
First working app
Added screens for file choosing
Enhanced side panel folding
Added method to go to previous screen
Added functionality to Cancel button in FileChoose
Added functionality to Open button on FileChooser
Change transition on go_previous_screen
Changed screen for something less basic
Added potential new view
Added tabbed panel to side panel
Added spacing in stacked layout of side panel
Slight adjustment to side panel final width
Program now stores input files into a variable
Open button now only returns selection list
Removed default tab
Open files now populates the file list in the side panel
Prevented selecting duplicate files