Rerwite everything to share an egui context

src/window/vip/registers.rs

@@ -2,7 +2,7 @@ use std::sync::Arc;
 
 use egui::{
     Align, Button, CentralPanel, Checkbox, Color32, Direction, Label, Layout, ScrollArea, TextEdit,
-    Ui, ViewportBuilder, ViewportId,
+    Ui, ViewportBuilder,
 };
 use egui_extras::{Column, Size, StripBuilder, TableBuilder};
 
@@ -630,10 +630,6 @@ fn read_address<T: MemoryValue>(registers: &MemoryRef, address: usize) -> T {
 }
 
 impl AppWindow for RegisterWindow {
-    fn viewport_id(&self) -> ViewportId {
-        ViewportId::from_hash_of(format!("registers-{}", self.sim_id))
-    }
-
     fn sim_id(&self) -> SimId {
         self.sim_id
     }