Terminal: Disable the semitransparent Terminal effect for now.

It's cool and everything but the lag is annoying me while I'm trying to
get shit done. I'll definitely reenable it once it's been optimized.

Applications/Terminal/Terminal.h

@@ -152,7 +152,7 @@ private:
 
     GNotifier m_notifier;
 
-    float m_opacity { 0.8f };
+    float m_opacity { 1 };
     bool m_needs_background_fill { true };
 
     int m_glyph_width { 0 };