Migrate featureinfobox to Tailwind

- migrate featureinfobox to Tailwind
- migrate featureinfobox-content to Tailwind
- migrate fullscreenmessage-content to Tailwind so we can delete css/fullscreenmessagebox.css

The landscape-mode is somethign that Tailwind does not support AFAIK. Instead, I migrated the one css-definition that was left over but required to a tailwind-like class name `.landscape\:max-h-screen`. Note the escaped colon with is required so css supports colon based class names.

UI/FullScreenMessageBoxHandler.ts

@@ -20,7 +20,7 @@ export default class FullScreenMessageBox extends UIElement {
             return "";
         }
         this._content = State.state.fullScreenMessage.data.content;
-        return new Combine([this._content]).SetClass("fullscreenmessage-content").Render();
+        return new Combine([this._content]).SetClass("block max-h-screen h-screen overflow-x-hidden overflow-y-auto bg-white p-2").Render();
     }
 
     protected InnerUpdate(htmlElement: HTMLElement) {