Bulk-Revert: Level edit page cleanup

[islemaster]

We got some feedback on the recent level edit page changes that we need to do a little more usability work before we ship this to our level builders. In particular:

• Expand/collapse all feature is not working as expected. (Slack conversation)
• Searchability of fields is not as good as it used to be. (Slack conversation)

Reverts:

• Levelbuilder Level Page Clean Up: Game Lab, Sprite Lab, and Dance #29121
• Levelbuilder Level Page Clean Up: App Lab and Web Lab #29123
• Levelbuilder Level Page Clean Up: Artist, Bounce, Flappy, Minecraft, Karel, Maze #29124
• Levelbuilder Level Page Clean Up: Blockly Editors, Callouts, Instructions #29126
• Levelbuilder Level Page Clean Up: CS in A, Play Lab, Grid #29127
• Levelbuilder Level Page Clean Up: Droplet and General Programming Level Stuff #29129
• Levelbuilder Level Page Clean Up: Expand All/ Collapse All button - Take 2 #29137 (which included Levelbuilder Level Page Clean Up: Expand All/ Collapse All button #29133)

Note: When we are ready for our next revision on this work, we should be able to revert this one PR, and continue forward from there.

[davidsbailey]

LGTM

Whenever we un-revert this, I'll have a follow-up task to extract some js from haml here: #29133 (comment)