simplified handleColumnOverflow to only detect and act during second column overflow, trusting page css to handle two column balancing, works pretty good
added update_template.html which is same architecture as storeUI.html page-container, so testing will be more accurate. Updated extractBlocks function to target block-items
Removed some white spaces, added functions to lock textares during drop events, and unlock at end of drop events, added check for 'description-textarea' while handling drop