Follow-up from "Wire-up EditDrawer with FrontMatterControls"

The following discussion from !41920 (merged) should be addressed:

• @markrian started a discussion: (+1 comment)

  suggestion (non-blocking): Should the editor catch YAML parsing exceptions while the user edits the document in markdown view?

  When testing this locally, I tried going into the markdown view and editing the front-matter manually. While doing so, the console reported lots errors, like:

  [Vue warn]: Error in v-on handler: "YAMLException: can not read a block mapping entry; a multiline key may not be an implicit key at line 5, column 1:
      
      ^"
  
  found in
  
  ---> <RichContentEditor> at vue_shared/components/rich_content_editor/rich_content_editor.vue
         <EditArea> at static_site_editor/components/edit_area.vue
           <Home> at static_site_editor/pages/home.vue
             <App> at static_site_editor/components/app.vue
               <Root>

  I see that that's not related to this MR, so WDYT of opening a follow-up issue?

Duplicate/related: #255920 (closed)