MDL-49536 theme_clean: update help text for logo

Updated the help text on the theme settings page to
mention that the theme logo will only be displayed on
the front page and login page.

theme/clean/lang/en/theme_clean.php

@@ -57,7 +57,7 @@ $string['invert'] = 'Invert navbar';
 $string['invertdesc'] = 'Swaps text and background for the navbar at the top of the page between black and white.';
 
 $string['logo'] = 'Logo';
-$string['logodesc'] = 'The logo is displayed in the header.<br />
+$string['logodesc'] = 'The logo is only displayed in the header of the front page and login page.<br />
 If the height of your logo is more than 75px add a.logo {height: 100px;} to the Custom CSS box below, amending accordingly if the height is other than 100px.';
 
 $string['pluginname'] = 'Clean';

theme/more/lang/en/theme_more.php

@@ -64,7 +64,7 @@ $string['invertdesc'] = 'Swaps text and background for the navbar at the top of
 $string['linkcolor'] = 'Link colour';
 $string['linkcolor_desc'] = 'The colour of the links.';
 $string['logo'] = 'Logo';
-$string['logodesc'] = 'The logo is displayed in the header.<br />
+$string['logodesc'] = 'The logo is only displayed in the header of the front page and login page.<br />
 If the height of your logo is more than 75px add a.logo {height: 100px;} to the Custom CSS box below, amending accordingly if the height is other than 100px.';
 
 $string['pluginname'] = 'More';

theme/upgrade.txt

 This files describes API changes in /theme/* themes,
 information provided here is intended especially for theme designer.
 
+=== 2.8.8 ===
+
+* Themes Clean and More page header logo only displays on front page and login page.
+
 === 2.8 ===
 
 * All mod_assign CSS selectors have been qualified with ".path-mod-assign". This means any custom CSS