Clear the track in a non desctrutive way

[embarc-gabriel]

Resolves: #7700

This changes clear the track in a non desctrutive way.
We can restore the content expading the track for delete and cut operation.
Apart from that, if we cut and past the track in another position we can also recovery the missing data.

• I signed CLA
• The title of the pull request describes an issue it addresses
• If changes are extensive, then there is a sequence of easily reviewable commits
• Each commit's message describes its purpose and effects
• There are no behavior changes unnecessary for the stated purpose of the PR

Recommended:

• Each commit compiles and runs on my machine without known undesirable changes of behavior

[embarc-gabriel]

@dozzzzer this will allow to recover the track for delete and cut operations. I think this is expected, right?
But it will also allow you to recover the data after cut and paste a track. Is this an reasonable side effect of this change?

[dozzzzer]

Yes, both changes are expected