(svn r8106) -Feature/Fix: Add the ability to load savegames when you don't have the exact GRF files in your list. GRF files that are found based on GRFID (but not on matching md5sum) are used instead of disabling them. This does not affect MP games, there you still need an exact match.

-GRF Window colour-codes changed a bit: Static is now grey, and compatible GRF (found locally only based on GRFID) are shown in orange. Compatible GRF's also have an orange status/warning text saying they're not the original the game was saved with.
-Loaded games with something amiss regarding GRF's will show an appropiate warning message.

src/lang/english.txt

@@ -2915,6 +2915,11 @@ STR_NEWGRF_DUPLICATE_GRFID                                      :{WHITE}Cannot a
 
 STR_NEWGRF_NOT_FOUND                                            :{RED}Matching file not found
 STR_NEWGRF_DISABLED                                             :{RED}Disabled
+STR_NEWGRF_COMPATIBLE_LOADED                                    :{ORANGE}Matching file not found (compatible GRF loaded)
+
+STR_NEWGRF_COMPATIBLE_LOAD_WARNING                              :{WHITE}Compatible GRF(s) loaded for missing files
+STR_NEWGRF_DISABLED_WARNING                                     :{WHITE}Missing GRF file(s) have been disabled
+STR_NEWGRF_NOT_FOUND_WARNING                                    :{WHITE}Missing GRF file(s) to be able to load game
 
 STR_CURRENCY_WINDOW                                             :{WHITE}Custom currency
 STR_CURRENCY_EXCHANGE_RATE                                      :{LTBLUE}Exchange rate: {ORANGE}{CURRENCY} = £ {COMMA}