Make menu items functional

src/shrooms_vb_core.rs

@@ -119,6 +119,10 @@ impl CoreVB {
         CoreVB { sim }
     }
 
+    pub fn reset(&mut self) {
+        unsafe { vb_reset(self.sim) };
+    }
+
     pub fn load_rom(&mut self, rom: Vec<u8>) -> Result<()> {
         self.unload_rom();