Make chat loaded from log file be in LogChatColor instead of hardcoded grey

indra/newview/app_settings/settings.xml

@@ -2079,6 +2079,24 @@ This should be as low as possible, but too low may break functionality</string>
 	  <key>IsCOA</key>
 	  <integer>1</integer>
     </map>
+    <key>LogChatColor</key>
+    <map>
+      <key>Comment</key>
+      <string>Color of chat messages loaded from your log</string>
+      <key>Persist</key>
+      <integer>1</integer>
+      <key>Type</key>
+      <string>Color4</string>
+      <key>Value</key>
+      <array>
+        <real>0.5</real>
+        <real>0.5</real>
+        <real>0.5</real>
+        <real>1.0</real>
+      </array>
+	  <key>IsCOA</key>
+	  <integer>1</integer>
+    </map>
     <key>UISndAlert</key>
     <map>
       <key>Comment</key>

indra/newview/llfloaterchat.cpp

@@ -277,7 +277,7 @@ void LLFloaterChat::addChatHistory(LLChat& chat, bool log_to_file)
 	
 	LLColor4 color = get_text_color(chat);
 	
-	if (!log_to_file) color = LLColor4::grey;	//Recap from log file.
+	if (!log_to_file) color = gSavedSettings.getColor("LogChatColor");	//Recap from log file.
 
 	if (chat.mChatType == CHAT_TYPE_DEBUG_MSG)
 	{

indra/newview/llimpanel.cpp

@@ -1670,7 +1670,7 @@ void LLFloaterIMPanel::chatFromLogFile(LLLogChat::ELogLineType type, std::string
 	}
 
 	//self->addHistoryLine(line, LLColor4::grey, FALSE);
-	LLStyleSP style(new LLStyle(gSavedSettings.getColor4("SystemChatColor")));
+	LLStyleSP style(new LLStyle(true, gSavedSettings.getColor4("LogChatColor"), LLStringUtil::null));
 	self->mHistoryEditor->appendText(message, false, true, style, false);
 }