v0.24 PandasGui

changed the UI to be menu based instead of buttons
added option to change between light and dark mode
made app resizable
made that you can switch to the old UI via options
improved buttons UI
added key shortcuts
added an option to open a file via internet link
added a function that renames columns
added a warning about leaving unsaved progress when quitting the program
added "Nunique" function
added "Cumsum" function