This item is not replicated across Roblox’s server/client boundary.
Enabled determines whether a button is clickable in general. When this property is false, the button will be greyed out and unclickable, preventing the user from firing the
PluginToolbarButton/Click|Click event. Buttons are enabled by default.
Plugins should disable their buttons when the button action isn’t relevant in the current context. For example, a plugin button that assigns random colors to selected should not be enabled when the selection contains no parts. See the code samples for more information.
PluginToolbarButton/ClickableWhenViewportHidden|ClickableWhenViewportHidden, which determines whether a button is clickable when the game view is hidden (and not just in general)