- add <Col>s to areas with <Row>s for consitency

- give main content a fixed width so really wide forms dont look that funny
- fix to make markdown editor preview text black to address https://github.com/owncast/owncast/issues/726

web/styles/markdown-editor.scss

@@ -32,6 +32,8 @@
 
   // Custom CSS for formatting the preview text
   .markdown-editor-preview-pane {
+    color: var(--black-75);
+
     a {
       color: var(--owncast-purple);
     }
@@ -49,7 +51,6 @@
   }
 
 
-
   // Set the background color of the editor text input
   textarea {
     background-color: var(--gray) !important;