Swap to EasyMDE

Various other fixes too

package.json

@@ -14,6 +14,7 @@
     "bootstrap-select": "^1.13.17",
     "clipboard": "^2.0.8",
     "cssnano": "^5.0.13",
+    "easymde": "^2.16.1",
     "fullcalendar": "^5.10.1",
     "gulp": "^4.0.2",
     "gulp-concat": "^2.6.1",
@@ -26,12 +27,10 @@
     "html5sortable": "^0.13.3",
     "jquery": "^3.6.0",
     "konami": "^1.6.3",
-    "marked": "^4.0.10",
     "moment": "^2.27.0",
     "node-sass": "^7.0.0",
     "popper.js": "^1.16.1",
     "postcss": "^8.4.5",
-    "simplemde": "^1.11.2",
     "uglify-js": "^3.14.5"
   },
   "devDependencies": {