https://tkinter.programujte.com/tkinter-widget-styling.htm
https://programujte.com/clanek/2007032601-tkinter-textovy-editor-1-cast/
https://www.root.cz/clanky/graficke-uzivatelske-rozhrani-v-pythonu-dalsi-moznosti-nabizene-widgety-text-a-scrolledtext/