Add option to return to build selection when crashing

[vaisest]

Description of the problem being solved:

Fixes issues where users encounter an issue which crashes PoB when loading. This is obviously not very common, but in cases such as #2217 can cause PoB to crash when loading, which renders both the dismiss and restart options useless. There can also be crashes in Draw functions, such as when it happened to timeless jewels at the start of 0.5 due to missing textures.

This option lets users at least continue using PoB without having to manually remove the problematic profile file, which they probably won't know to do.

Steps taken to verify a working solution:

• Yes
• Can be tested by e.g. adding an error() to a tab's Draw method

Link to a build that showcases this PR:

https://pobb.in/wS-S5R5EYZfC (#2217 build which crashes)

Before screenshot:

After screenshot: