Merge pull request #105 from DSheirer/#102-tooltip_typo

#102 resolves typo in tooltip for R820T Tuner Editor

src/source/tuner/rtl/r820t/R820TTunerEditor.java

@@ -308,7 +308,7 @@ public class R820TTunerEditor extends TunerConfigurationEditor
             }
         } );
         mComboMixerGain.setToolTipText( "<html>Mixer Gain.  Set master gain "
-        		+ "to <b>MASTER</b> to enable adjustment</html>" );
+        		+ "to <b>MANUAL</b> to enable adjustment</html>" );
         
         add( new JLabel( "Mixer:" ) );
         add( mComboMixerGain );