Deleting patches that are part of a Synth Bank throws error instead of explanation why they can't be deleted

[christofmuc]

Trying to delete a whole imported bank I get the following error:

error DATABASE ERROR in deletePatches via filter: SQL Exception FOREIGN KEY constraint failed

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Deleting patches also doesn't seem to work and I get the following error:

warning Could not delete patch Synthwave 2.3 from database as it is referred to be at least one bank definition. Removed it from user lists and set it to hidden instead

Originally posted by @RadekPilich in #378

[RadekPilich]

@christofmuc Feel free to close this one. I now understand how to delete synth banks, imports, patches. Some tooltip guide or help page would be helpful to grasp this. Although it's probably easier / more effective if I or someone else made a handful of short videos to show the main workflows and functions.

[christofmuc]

Yea, thanks! I keep this open because there should be a dialog box popping up and not a SQL Exception error, the software can be a bit more friendly...

The video idea is good, I am just incredibly slow at that, which is why I never got around to do it,

[christofmuc]

Reworked delete logic so it hides patches that are part of the bank instead of trying to delete them, which wouldn't work.