Issue #807 Hide mouse pointer in most cases

[Mipuim]

No description provided.

[github-actions]

Play this branch at https://play.threadbare.game/branches/Mipuim/main/.

(This launches the game from the start, not directly at the change(s) in this pull request.)

[KarmDK]

Hi! You should add a description to the pull request,
explaining the change this PR introduces and the reason for it.
Also, add a link to the task on the last line.
Check:
https://github.com/endlessm/threadbare/wiki/Contributing

[KarmDK]

Additionally, this PR includes the changes from your previous task. Please ensure that this PR shows only the changes corresponding to the current task.

[manuq]

@Mipuim please sync your fork with the main repository. This pull request contains the changes you did for the collectible health items in #1744 . Also please update the pull request title and description to match our Contributing guidelines. Doing that will also link this PR with the corresponding issue #807

[manuq]

@KarmDK sorry, I posted before reading your comments. @Mipuim please do all as @KarmDK said!