Reuse existing indicators

[leolost2605]

Just an idea that came to mind maybe we could reuse the get_widget from the other indicators and put them here as subpages? I think the powerful indicators are a big selling point for elementary and this would allow us to kinda provide both depending on size/a toggle?

[leolost2605]

So for example for bluetooth we use the get_display_widget to get the icon for the toggle and put an arrow next to it which then opens a submenu with the get_widget

[danirabbit]

Tbh a lot of that code is really trash so I'd kind of like to rewrite it anyways 😅