Loading Indicators for Rack view

With a slow or unreliable internet connection, it could be hard to tell whether a large rack had fully loaded. Now, each module has its own loading indicator. The position where a module will appear is also shown with a dashed placeholder outline. Works also with pedals.
If you never see any of these indicators - congratulations, you have a great internet connection.

Rack Planner improved

• Improved module collision detection - fewer false positives.
• Enhanced “fuzzyswap”: when you drop a smaller module onto a larger one, the larger module is repositioned more intelligently around it.
• Improved module push behavior: clicking a double-arrow button pushes the module to the next adjacent module; clicking again pushes the entire block.
• Overall JS performance increased.
• fixed several other bugs and introduced new ones.