Fix a slight translation problem in three translations.

For some unknown reason the same string in three different languages
ended up being preceded by some text which clearly doesn't belong
there.

The languages affected were GB English, Portuguese and French.

mythtv/i18n/mythfrontend_en_gb.ts

@@ -8523,7 +8523,7 @@ Do you wish to continue watching?</translation>
     <message>
         <location filename="../programs/mythfrontend/globalsettings.cpp" line="364"/>
         <source>7.1</source>
-        <translation>0% {7.1?}</translation>
+        <translation>7.1</translation>
     </message>
     <message>
         <location filename="../programs/mythfrontend/globalsettings.cpp" line="380"/>

mythtv/i18n/mythfrontend_fr.ts

@@ -13275,7 +13275,7 @@ Il se peut que vous deviez utiliser le bouton d&apos;éjection sur le lecteur.</
         <location filename="../programs/mythfrontend/globalsettings.cpp" line="364"/>
         <source>7.1</source>
         <translatorcomment>7.1</translatorcomment>
-        <translation>0 % {7.1?}</translation>
+        <translation>7.1</translation>
     </message>
     <message>
         <location filename="../programs/mythfrontend/globalsettings.cpp" line="380"/>

mythtv/i18n/mythfrontend_pt.ts

@@ -13071,7 +13071,7 @@ You may have to use the eject button under its tray.</source>
     <message>
         <location filename="../programs/mythfrontend/globalsettings.cpp" line="364"/>
         <source>7.1</source>
-        <translation>2h {7.1?}</translation>
+        <translation>7.1</translation>
     </message>
     <message>
         <location filename="../programs/mythfrontend/globalsettings.cpp" line="380"/>