Screen Management: Deleted (removed) screens 'in the middle' re-appear after restart of OpenLauncher (bug)

[just-Nob]

General information

• App version: 0.5.8(alpha)
• Android Version: 7.1.1 Nougat

Expected result

What is expected?
A removed screen stays removed and don't re-appears after a restart of OpenLauncher.

What does happen instead?
If the deleted/removed screen is "in the middle" (i.e. between other screens), it re-appears after OpenLauncher was restarted. It doesn't matter if it's only one screen or multiple screens being removed. Anyway, its/their content is lost and don't re-apper, for sure!

Steps to reproduce

• Go to "Settings --> Debug --> Reset Database" and execute.
• Place minimum two widgets on the homescreen.
• Create two new screens to the right by dragging minimum one widget to the right, so far that you have three screens in total.
• Set the leftmost (original) screen as the home screen.
• Remove the second screen in the middle. It doesn't matter if the is any content like widgets or app shortcuts.
• Restart OpenLauncher ("Settings --> Debug --> Restart").
• The removed screen is like the T-800: He's back (but always empty, i.e. without any content like widgets or app shortcuts).

Only deleted screens between other screens re-appear!
If you remove a screen "at the end", it won't re-appear after a restart!

[Benjilein]

Got the same issu with the rightmost screen. If you look into the backfile, there ist still an empty screen, which gets inizialized, when reloading the app.

[Ptitg]

Fixed by #679