Template Manager: Use actual template icons if no thumbnail exists

Change-Id: Ie1ee86a180701355886a340ea97940303f527422
Reviewed-on: https://gerrit.libreoffice.org/3278Reviewed-by: Bosdonnat Cedric <cedric.bosdonnat@free.fr>
Tested-by: Bosdonnat Cedric <cedric.bosdonnat@free.fr>

sfx2/source/appl/sfx.src

@@ -41,22 +41,22 @@ String STR_PASSWD
 
 Bitmap ( SFX_THUMBNAIL_TEXT )
 {
-    File = "odt_48_8.png";
+    File = "ott_48_8.png";
 };
 
 Bitmap ( SFX_THUMBNAIL_SHEET )
 {
-    File = "ods_48_8.png";
+    File = "ots_48_8.png";
 };
 
 Bitmap ( SFX_THUMBNAIL_PRESENTATION )
 {
-    File = "odp_48_8.png";
+    File = "otp_48_8.png";
 };
 
 Bitmap ( SFX_THUMBNAIL_DRAWING )
 {
-    File = "odg_48_8.png";
+    File = "otg_48_8.png";
 };
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */