It's vital for UI framework to have excellent documentation. As I understand, flutter
documentation/tutorials are compatible with UIWidgets. We need to cover differences in documentation. (If there is any, I am not expert in flutter, it's pretty much the same for me)

The ContextMenuItemAttribute type includes a function parameter that is a string literal referencing a function name on the current type.

Add a reference to the method:

• Code completion
• Find usages
• Rename
• Inspections for method signature
• Create from usage
• Suggest using nameof

Tooltips should adjust their positions when hovered. As a quick initial implementation of this functionality, we could offset their local position by doubling the magnitude of their current local position(offset). When tooltips support interaction, if they perform secondary actions via ray input, they should not perform such a position offset (as the intent will be to interact with the tooltip c

There is a new API set, added on Unity 5.6.x, still it is beta stage though, under the UnityEditor.IMGUI.

• MultiColumnHeader

UnityEditor.IMGUI.Controls seems to be one can replace current column-header setting.

The problem of the current column-header setting is that it works fine but

From a brief glance this seems to be using it: https://github.com/alelievr/Mixture

Are you aware of others? It would be useful to browse a few real applications of this project.

The Header Attribute can be used to group the properties into different sections with different headers but this makes it so EasyButtons' buttons don't show up.

As a user, I want to know how up to date my languages are before I press the button to Update.

The suggestion is to add a bit of text under the Languages that would say
"Last updated: X".

Another implementation would be to query the server for updated languages every time we open up the Preferences window. If there is an update, it could prompt the user. This would be a bit trickier, as it