Apply no-drag to all direct descendants except for .endButtons

[luixxiul]

Closes #5792

Auditors:

Test Plan:

1. Make sure the non-draggable area specified in Added noscript into the URL bar - Move noscript into the URL bar #5792 is draggable
2. Make sure every button on the navigation bar is clickable
3. Open https://jsfiddle.net/
4. Block scripts from the top right lion icon
5. Make sure the noScript button on the navigation bar is clickable

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).