Only show 'Close Library' if your in a library

[CarterPillow]

This is my first commit like ever on anything I know I made a lot of changes but I don't think this should have any effect outside of just only showing the close button when inside a library!

[Computerdores]

I would suggest also hiding the "Refresh Directories", "Save Library" and "Save Library Backup" Buttons

[CarterPillow]

I honestly did not even think of that but this hides all the buttons in the "files" menu that do not have any effect until you open a library I will look to see if there is anything else that might benefit from being hidden til you open a library.

[eivl]

Before opening a library

After

[CyanVoxel]

A better way to approach this in my opinion would be to simply disable the menu options instead of removing them entirely, for example how the Edit menu handles this:

This way the options don't change locations making them more difficult to find based on the state of the library, plus the user is made aware of all options whether they're presently available or not.

[CarterPillow]

Before Opening a Library

After

I looked at how the items were disabled in the version you showed (Alpha 9.4.0) and decided to add the "update_clipboard_actions" function over. Not the code from it since none of that is added yet just the function its self. This means that all the buttons will be enabled at first but since its the same function the ones that need to be disabled will be checked then disabled in the same code so its not a problem.

[CarterPillow]

I woke up to a lot of merges and this no longer working so ill have a look at what broke it and fix this pr lol