When someone edits code in the code tab, then changes the blocks, their changes will disappear. We should probably create a new tab with their edited version preserved, or at least prompt them if they really want to throw away their changes. Could also prompt before creating a new tab.
We'd have to figure something out from scratch for this:
"Blockly can export from blocks to JavaScript, Python, and Dart. However we have no plans to import from one of these languages to Blockly"
When someone edits code in the code tab, then changes the blocks, their changes will disappear. We should probably create a new tab with their edited version preserved, or at least prompt them if they really want to throw away their changes. Could also prompt before creating a new tab.