Provide user a possibility to recover from runtime exceptions

[evgenykochetkov]

Right now, we handle most exceptions in a fairly user-friendly way(ones that may occur during transpilation process and in redux thunks).

But some lead to "crash to the gray screen", not giving a user any error messages or even a chance to save currently opened project(like #1468). Those exceptions are caused by a combination of current state and some bug in selectors or rendering code. In that case, we can't just try rendering the same thing again, because that would lead to the same exception.

But instead of rendering nothing, we can provide some recovery options

• export current changes to a .xodball
• undo last action and try rendering again
• simulate opening project in the current state(that could help if crash was caused by some complex UI manipulations)