Hide Taskbar icon if overlay is pinned

[samfry13]

Is your feature request related to a problem? Please describe. On Windows, the overlay window stays present on the taskbar even when the overlay is pinned (i.e. hidden) and the user is not in a call

Describe the solution you'd like If the user has the overlay pinned, don't show a window on the taskbar

Describe alternatives you've considered N/A

Additional context	Screenshot

Tauri has a setting for skipping the taskbar. This could potentially be set/unset when the user pins/unpins the overlay window respectively

[Hacksore]

Yeah I'll think we can support this but as an opt-in. We'd want something like this for the config:

• windowsHideFromTaskbarWhenPinned (for windows we can call set_skip_taskbar
• macHideFromDockWhenPinned (for macOS we can call a custom impl to chage set_activation_policy to Accessory)
• Linux (no idea 😂)

@ahkohd can we change the activation policy dynamically at runtime so that when pinning we make it hidden from the dock and unpinning it goes back to normal?

[samfry13]

I believe set_skip_taskbar works for both windows and linux. It's just MacOS that isn't supported from that method.

[ahkohd]

Yeah I'll think we can support this but as an opt-in. We'd want something like this for the config:

* `windowsHideFromTaskbarWhenPinned` (for windows we can call [set_skip_taskbar](https://docs.rs/tauri/latest/tauri/window/struct.Window.html#method.set_skip_taskbar)

* `macHideFromDockWhenPinned` (for macOS we can call a custom impl to chage `set_activation_policy` to `Accessory`)

* Linux (no idea 😂)

@ahkohd can we change the activation policy dynamically at runtime so that when pinning we make it hidden from the dock and unpinning it goes back to normal?

The activation policy is called in the Tauri setup function, which is already running at runtime. This should make it possible.