Sidebar improvements

[JosefNemec]

• option to change order of items
• ability to add filter presets Adding filter preset to the sidebar #2543

[bburky]

One more:

• add URLs to sidebar? (I almost wonder if supporting any GameAction makes sense?)
  https://discord.com/channels/365863063296933888/456880338346704913/899527517747154975

[bburky]

Also, it may make sense to unify some very similar actions like this in Playnite.

Currently an extension can place actions in:

• main menu
• top panel
• sidebar
• context menu (this one is per game, the others are global)

I wonder if a generic configuration mechanism could solve all of this? Allow extensions to register "actions", with an icon and text. Then have a settings pane to allow users to configure where (and if) they appear anywhere in the UI. You could even allow reconfiguring some of the built-in UI this way too.

And the settings can allow users to manually add things like "Software Tools", filter presets, or games to the list too.

Today a GameMenuItem or MainMenuItem can have a MenuSection. If these were all unified, and an "action"' with a submenu was assigned to a top panel button or sidebar, just have a context menu pop out on click. You could tweak the API to make MenuSection be a System.Windows.Controls.ContextMenu instance, but I'm not sure if you need to.

[JosefNemec]

I agree that this should be more generalized, I opened #2604 for it. Lets continue discussion there.

[JosefNemec]

I'm closing this, it basically overlaps with #2604