Inventory context menus are inconsistent and allow certain actions when they shouldn't

Environment

Second Life Release 7.2.3.19375695301 (64bit)

Description

PR with potential fixes: Coming soon after confirmations of what is intended to the below questions

Need confirmation on which of these are intentional and what is the preferred way things should be for each case so I can create a PR-

1. The viewer currently restricts the usage of creating folders in certain places in the inventory, namely the favorites bar, lost and found, and outfit folders. However, there is another way to create folders and that is the "create folder from selected" option, which even in those restricted folders allows new folders to be created.

   1. Is this by design?
   2. Or should create folder from selected also be disallowed in these folders?
   3. Or should folder creation be allowed?

2. The inventory gallery context menus currently allow doing almost anything in all the restricted folders. If one of the restricted folders has even a single image/texture file, right clicking it in the inventory gallery gives you full access to create folders where you shouldn't be able to, and create assets where you shouldn't be able to.

   1. Is this by design?
   2. Or should it match the behaviour of the main inventory context menu?

3. The lost and found folder doesn't allow creation of new assets or folders, however you can freely drag/cut/copy assets into it.

   1. Is this by design?
   2. Or should dragging/cut/copying also be disallowed?
   3. Or should asset creation be allowed since you can already put existing assets in there already?

4. The Favorites bar folder and Landmarks folder both allow the user to create new assets in them that are not landmarks. However, the user is not allowed to drag, cut, or copy assets into these folders.

   1. Is this by design?
   2. Or should dragging/cut/copying into them be allowed?
   3. Or should asset creation in these folders be disallowed?

Reproduction steps

For creating folders:

1. Right click the Favorites bar, lost and found folder, or an outfit folder, where new folder creation is usually restricted
2. Note how you cannot create a folder
3. Select items inside one of those above restricted folders
4. Right click and notice the option to create folder from selected is available and works to create folders

Inventory Gallery view:

1. Make sure at least 1 image/texture asset is inside one of the restricted folders (such as lost and found)
2. Right click the restricted folder and note which context menu items shouldn't be allowed
3. Toggle the view to inventory gallery mode
4. Right click one of the image/texture assets in the gallery view and observe all the context menu items not being restricted

Lost and found folder:

1. Right click the lost and found folder and note you cannot create new assets in it
2. Drag, cut or copy an asset from a different folder into lost and found
3. Observe this works despite being unable to create new assets

Favorites bar and landmarks folders:

1. Right click these folders and note you can create new assets in them
2. Drag, cut or copy and asset from a different folder into favorites bar or landmarks folder
3. Observe you cannot do this despite being able to create new assets