Feature: Allow GameScripts to add additional text to Industry view window

src/saveload/industry_sl.cpp

@@ -72,6 +72,7 @@ static const SaveLoad _industry_desc[] = {
 
 	SLE_CONDNULL(1, SLV_82, SLV_197), // random_triggers
 	SLE_CONDVAR(Industry, random,                     SLE_UINT16,                SLV_82, SL_MAX_VERSION),
+	SLE_CONDSSTR(Industry, text,     SLE_STR | SLF_ALLOW_CONTROL,     SLV_INDUSTRY_TEXT, SL_MAX_VERSION),
 
 	SLE_CONDNULL(32, SLV_2, SLV_144), // old reserved space
 

src/saveload/saveload.h

@@ -323,6 +323,7 @@ enum SaveLoadVersion : uint16 {
 
 	SLV_GS_INDUSTRY_CONTROL,                ///< 287  PR#7912 and PR#8115 GS industry control.
 	SLV_VEH_MOTION_COUNTER,                 ///< 288  PR#8591 Desync safe motion counter
+	SLV_INDUSTRY_TEXT,                      ///< 289  PR#8576 Additional GS text for industries.
 
 	SL_MAX_VERSION,                         ///< Highest possible saveload version
 };