Fix markdown.

frontend/app/shared/components/forms/markdown-editor.component.scss

@@ -3,7 +3,10 @@ $background: #fff;
 :host ::ng-deep {
     // sass-lint:disable class-name-format
     .CodeMirror {
+        box-sizing: content-box;
         height: 300px;
+        padding-bottom: 10px;
+        padding-top: 0;
     }
 }
 

frontend/app/shared/components/forms/markdown-editor.component.ts

@@ -90,6 +90,8 @@ export class MarkdownEditorComponent extends StatefulControlComponent<State, str
                     return marked(text, { pedantic: true });
                 },
                 autoDownloadFontAwesome: true,
+                spellChecker: false,
+                status: true,
                 toolbar: [
                     {
                         name: 'bold',