Add song deletion functionality 🗑️

[fwolfst]

Draft for #192

Description

User wants to delete projects, especially on devices with no or limited possibilities to delete files and directories "manually".

The most useful place to do so might be in the project view, because there we probably listened to and looked at the current project, whereas in the main(?) view the user would need to know the projects name in order to delete the correct one.

After deletion from the projects view, the user shall be presented the load/new ("main"?) view.

Findings and pointers so far:

• make sure to free that projects/songs/instruments/... memory
• there is no 'delete directory' functionality implemented yet
• delete directory implementation will differ from platform to platform :(

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Description

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• Bug fix (non-breaking change which fixes an issue)
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[djdiskmachine]

Hey thanks for making this!
I'm not sure it makes sense having the delete option in the project view, where would you end up when deleting a project when inside a project for instance?
I think having a load screen menu item and/or button combo makes the most sense. :)

[fwolfst]

Hey thanks for making this! I'm not sure it makes sense having the delete option in the project view, where would you end up when deleting a project when inside a project for instance? I think having a load screen menu item and/or button combo makes the most sense. :)

I certainly think its a bit more difficult to implement. Its the screen where I was searching the functionality, after having played with a track until I deemed it broken. (Brain: "go up, delete, create new"). When one opens the "Load (or new)" screen from there, the selected entry is the last song afaik, that would also work. In the project screen the current projects title is not avaible/visible. I wanted to patch that, but I couldnt figure out where to find the songs title.
Also note that there is no actual deletion code yet - unfortunately that'll need to get implemented per "filesystem".