show more detailed name info for blockly levels in LevelToken

[davidsbailey]

Curriculum Writers commented that it is important to have good level names, since it can be hard to see what changed after dragging and dropping a level. With this in mind, I noticed that levels which are defined in levels.js files all appear as "blockly" in the Lesson editor:

This PR makes a simple fix which is to use the level "key" instead of the name. This is the same as the level name for levelbuilder-created levels, but gives more detail than just "blockly" for levels defined in levels.js files:

code-dot-org/dashboard/app/models/levels/level.rb

Lines 491 to 497 in 76a05d3

	def key
	if level_num == 'custom' || level_num.nil?
	name
	else
	["blockly", game.name, level_num].join(':')
	end
	end

This is where the key is getting set:

code-dot-org/dashboard/app/models/script_level.rb

Line 402 in ab81d45

summary[:key] = level.key

Testing story

This seems like a small enough change that I just did manual testing to verify. I confirmed the improvement in the screenshots above, and also checked that levelbuilder-defined levels in other lessons are still showing up as they did previously:

Reviewer Checklist:

• Tests provide adequate coverage
• Privacy and Security impacts have been assessed
• Code is well-commented
• New features are translatable or updates will not break translations
• Relevant documentation has been added or updated
• User impact is well-understood and desirable
• Pull Request is labeled appropriately
• Follow-up work items (including potential tech debt) are tracked and linked