Made a new "src" folder that will contain the source code files, like all the GDScript and scene files. Please read this for more details: https://www.gdquest.com/docs/guidelines/best-practices/godot-gdscript/
It made no sense to keep scenes separate from their scripts. More file organizing will follow soon.
Made the right panel in Main.tscn and CreateNewImage.tscn a little bigger, changed some labels, translations and some Global.can_draws. Also added a temporary fix for a issue where Space is being treated as a mouse press, for FrameButton.gd
Tabs are now included as Class items in all themes, the OK button in ExportDialog appears on the left on Windows machines, and on the right in all other operating systems. Also added border outlines to all window dialogs.
