Improve Role Layering Menu

[Histalek]

Is your feature request related to a problem? Please describe.

There are currently at least 2 pain points with the role layering menu:

• each baserole that has less than 2 subroles installed doesn't have its subrole-layering section displayed leading to confusion when switching between different servers/collections
• disabled subroles still show up the same as enabled ones do, which makes it harder to understand what the rolelayering will do
• (does the order of subroles in a layer even have any effect? being allowed to manually order items in a layer gives the impression that the order matters)

Describe the solution you'd like

• Show a notice why subrolelayering is not possible for each installed Baserole instead of hiding the whole section with less than 2 subroles installed
• visually distinct roleicons for disable subroles, maybe grayscale the color (subroles are sorted into their baseclasses section here, so the color isn't as important here anyways)
  • Done in Rolelayering: Show Role Enable Status #1715
• (if the order inside a layer has no effect: disable manual ordering inside of a layer and autosort by roleid or rolename)

[TimGoll]

(does the order of subroles in a layer even have any effect? being allowed to manually order items in a layer gives the impression that the order matters)

That should not have any effect. At least in the layers. I'm not 100% sure about the unlayered sections, but I'm pretty sure it is the same

[TimGoll]

Ignore this, wrong issue

[TimGoll]

This part is not yet done, so I'll repopen the issue:

each baserole that has less than 2 subroles installed doesn't have its subrole-layering section displayed leading to confusion when switching between different servers/collections