Improved markdown mobile editor experience

- Updated styles of codemirror area to be a bit more forefull in taking
up space.
- Added a fullscreen toggle as a backup option.

For #1675

resources/js/components/markdown-editor.js

@@ -76,6 +76,7 @@ class MarkdownEditor {
                 return;
             }
             if (action === 'insertDrawing') this.actionStartDrawing();
+            if (action === 'fullscreen') this.actionFullScreen();
         });
 
         // Mobile section toggling
@@ -480,6 +481,13 @@ class MarkdownEditor {
         });
     }
 
+    // Make the editor full screen
+    actionFullScreen() {
+        const alreadyFullscreen = this.elem.classList.contains('fullscreen');
+        this.elem.classList.toggle('fullscreen', !alreadyFullscreen);
+        document.body.classList.toggle('markdown-fullscreen', !alreadyFullscreen);
+    }
+
     // Scroll to a specified text
     scrollToText(searchText) {
         if (!searchText) {