Allow launching with custom data directories (#1505)

* Allow launching with custom data directories

Don't load alternate keys when using custom directory

* Address gdkchan's comments

* Misc fixes to log levels

Added more enabled log levels by default

Moved successful config updation to Notice as
1. It's not a warning
2. Warnings could've been disabled by the config load and hence message
   would be lost

Ryujinx.Common/Logging/Logger.cs

@@ -112,6 +112,11 @@ namespace Ryujinx.Common.Logging
                 AsyncLogTargetOverflowAction.Discard));
 
             Notice = new Log(LogLevel.Notice);
+            
+            // Enable important log levels before configuration is loaded
+            Error = new Log(LogLevel.Error);
+            Warning = new Log(LogLevel.Warning);
+            Info = new Log(LogLevel.Info);
         }
 
         public static void RestartTime()