[Bug] Linux, tray ID collisions with other Tauri apps

[Tunglies]

Origin issue: clash-verge-rev/clash-verge-rev#6771
Report by: @lidaxian121

TL;DR
Different tauri(tray-icon) application using same tray ID cause collisions with other tauri(tray-icon) applications.

Confirmed related code in

tray-icon/src/platform_impl/gtk/mod.rs

Line 138 in c5d077a

let icon_path = parent_path.join(format!("tray-icon-{}-{}.png", id.as_ref(), counter));

[FabianLars]

Not sure i want to change that tbh. I thought it would be better to have predictable file names etc if you set the ID yourself instead of letting tray-icon generate one based on the process id. But for this the "unique ID" part in the docs isn't clear enough.

I'm open to change it though since this is considered a non-user facing implementation detail.