#177766: Use dedicated table for caching instead of actual cache to reduce volatility of stored panels data

Fixed re-bind so that if you edit a context-page modal twice the page doesn't just reload, causing you to lose all your changes

#201237: by Wim Leers -- load panels.module on mini panels uninstall so we can delete panels displays.

Add legacy views; also add more administrative exposure to help the user learn where administration is.

#200808: Alternate displays from arguments were totally broken by commits designed to make default panels not need to be overridden so often.