Patch 1.3.1

What changed?

• Added a new custom default theme "Turquoise Leaf"
• Added F11 for quick switching between fullscreen and windowed modes
• Changing resolutions finally scale windows
• Added auto check for updates on startup and in settings
• Changed top window bar to be more "ImGui"
• Changed pop-ups to be more "ImGui"
• Q key now has multiple functions (removes visual transform feature, deselects object, selects the last object that was selected)
• New font for the editor "Montserrat"
• V key toggles the visibility of the selected object
• W/S and Up/Down can be used to switch between property tabes
• All buttons have slightly rounded corners
• Split the "Add item" button into "Add ext. item" and "Add item"
• "Add item" can now also add sprites and tilemaps
• "Add item" can be accessed with Ctrl + A
• "Cancel" buttons can be pressed with Escape
• Ctrl + S saves the level 
• Switched to SFML 2.6
• Removed window collapse button
• Removed the Shader layout 
• Fixed particle system texturing bug
• Other bug fixes