feat: Add missing MDI icon for QEditor

Author: rstoenescu

icons/ionicons.js

@@ -58,7 +58,7 @@ export default {
     arrowLeft: 'ion-chevron-left',
     arrowRight: 'ion-chevron-right'
   },
-  editor: { // TODO
+  editor: { // TODO (requires Material icons for some as Ionicons simply does not have everything needed)
     bold: 'format_bold',
     italic: 'format_italic',
     strikethrough: 'strikethrough_s',

icons/mdi.js

@@ -78,7 +78,7 @@ export default {
     outdent: 'mdi-format-indent-decrease',
     indent: 'mdi-format-indent-increase',
     removeFormat: 'mdi-format-clear',
-    formatting: '',
+    formatting: 'mdi-format-color-text',
     fontSize: 'mdi-format-size',
     align: 'mdi-format-align-left',
     hr: 'mdi-minus',