Bring package_development, package_games, package_graphics, package_network, package_multimedia, package_wordprocessing, edu_science, package_utilities, input_devices_settings, kcmsystem, personal, and looknfeel icons into XDG compliance

diff --git a/adept/installer/app.cpp b/adept/installer/app.cpp
index 131f595..5c60cb4 100644
--- a/adept/installer/app.cpp
+++ b/adept/installer/app.cpp
@@ -80,9 +80,9 @@
 }
 
 TQString IconPolicy::iconForGroup( TQString g ) {
-    if ( g == u8( "Office" ) ) return u8( "package_wordprocessing" );
-    if ( g == u8( "Internet" ) ) return u8( "package_network" );
-    if ( g == u8( "Science" ) ) return u8( "edu_science" );
+    if ( g == u8( "Office" ) ) return u8( "applications-office" );
+    if ( g == u8( "Internet" ) ) return u8( "applications-internet" );
+    if ( g == u8( "Science" ) ) return u8( "applications-science" );
     if ( g == u8( "Accessibility" ) ) return u8( "access" );
     if ( g == u8( "Others" ) ) return u8( "package" );
     return TQString( "package_" ) + g.lower();