Theme Fixes for v1.4 (#3014)
    
    * Theme Fixes

    

    A bunch of fixes for all themes

    

    * Change Checkbox Style

    

    Inverts color value of checked state indicators to make them easier to see.

    

    It was already applied to light theme, this applies it to all other themes.

    

    * Fix Viewbox

    

    * More Fixes

    

    Mainly fixes the exclusive radio buttons I missed in menus, also visually improves the tick mark icon in checkboxes, color balances the x-sheet for dark theme and light theme.

    

    * Style Progress Bar

    

    Adds style to QProgressBar

    

    Also brings back the tree folder color for the light theme (dark blue)

    

    * Fix QToolBar in Palette Windows

    

    Allows the border to show under QToolBar.

    

    Add clarity to QScrollBar handle (light).

    

    * Style Indicators

    

    Restyles all the indicators and radiobuttons, adds styles such as hover to radiobuttons that was missing