Examples: Using "dear imgui" terminology in all examples headers/comments + fix minor typo.

examples/example_apple_metal/Shared/ViewController.mm

@@ -45,9 +45,9 @@
     
     // If we want to receive key events, we either need to be in the responder chain of the key view,
     // or else we can install a local monitor. The consequence of this heavy-handed approach is that
-    // we receive events for all controls, not just ImGui widgets. If we had native controls in our
-    // window, we'd want to be much more careful than just ingesting the complete event stream, though
-    // we do make an effort to be good citizens by passing along events when ImGui doesn't want to capture.
+    // we receive events for all controls, not just Dear ImGui widgets. If we had native controls in our
+    // window, we'd want to be much more careful than just ingesting the complete event stream, though we
+    // do make an effort to be good citizens by passing along events when Dear ImGui doesn't want to capture.
     NSEventMask eventMask = NSEventMaskKeyDown | NSEventMaskKeyUp | NSEventMaskFlagsChanged | NSEventTypeScrollWheel;
     [NSEvent addLocalMonitorForEventsMatchingMask:eventMask handler:^NSEvent * _Nullable(NSEvent *event) {
         BOOL wantsCapture = ImGui_ImplOSX_HandleEvent(event, self.view);