Improve error log on resource import failure.

Assets/Cryville/Crtr/Browsing/LegacyResourceManager.cs

@@ -157,7 +157,7 @@ namespace Cryville.Crtr.Browsing {
 					resources = converter.ConvertFrom(file);
 				}
 				catch (Exception ex) {
-					LogAndPopup(4, ex.Message);
+					LogAndPopupExtra(4, ex, "Failed to import resource: {0}", ex.Message);
 					return false;
 				}
 				foreach (var res in resources) {
@@ -220,6 +220,12 @@ namespace Cryville.Crtr.Browsing {
 			Popup.Create(msg);
 		}
 
+		void LogAndPopupExtra(int level, object extraLog, string format, params object[] args) {
+			var msg = string.Format(format, args);
+			Logger.Log("main", level, "Resource", "{0}\n{1}", msg, extraLog);
+			Popup.Create(msg);
+		}
+
 		public string[] GetSupportedFormats() {
 			return converters.Keys.ToArray();
 		}