Add HorzSwipe gesture and integrate it into the ViewSelector

src/state/models/shell-ui.ts

@@ -66,6 +66,7 @@ export interface ComposerOpts {
 }
 
 export class ShellUiModel {
+  isViewControllingSwipes = false
   isModalActive = false
   activeModal:
     | ConfirmModel
@@ -80,6 +81,10 @@ export class ShellUiModel {
     makeAutoObservable(this)
   }
 
+  setViewControllingSwipes(v: boolean) {
+    this.isViewControllingSwipes = v
+  }
+
   openModal(
     modal:
       | ConfirmModel