feat: ability to cancel multiple selection from UI (#1045)

app/assets/javascripts/Services/IOService.ts

@@ -87,9 +87,14 @@ export class IOService {
     if (!modifier) {
       return
     }
+
     this.activeModifiers.delete(modifier)
   }
 
+  public cancelAllKeyboardModifiers = (): void => {
+    this.activeModifiers.clear()
+  }
+
   public handleComponentKeyDown = (modifier: KeyboardModifier | undefined): void => {
     this.addActiveModifier(modifier)
   }