Warn for unwanted electribe behavior

[JonathanTaquet]

The editor is voluntarily more flexible than the electribe.

Sometimes it may cause troubles. For instance if your sample "start" point is after an active slice "start" point, the electribe will play it properly, but it will not allow you to export the sample (saying something like "memory card full"); and if you try to export all samples (to e2sSample.all) the electribe will even freeze.

Other corner case may probably occur.

What would be done:

• [ ] Integrate more compatibility checks on the file content
• [ ] add warning messages on potential issues
• [ ] propose solutions or auto-fixes
• [ ] add an option to disable warnings for users that know what they are doing