update old-style try..catch asset loading

Stardew Valley 1.6 added DoesAssetExist, which is much more efficient than the old try..catch pattern.

docs/release-notes.md

@@ -2,6 +2,9 @@
 
 # Release notes
 ## Upcoming release
+* For players:
+  * Improved content load performance for non-English players.
+
 * For the web UI:
   * Improved JSON parser:
     * You can now hover/click braces to highlight matching pairs.

src/SMAPI/Framework/ContentManagers/BaseContentManager.cs

@@ -161,26 +161,22 @@ internal abstract class BaseContentManager : LocalizedContentManager, IContentMa
             string localeCode = this.GetLocale(language);
             IAssetName localizedName = new AssetName(baseName: assetName.BaseName, localeCode: localeCode, languageCode: language);
 
-            try
+            if (this.DoesAssetExist<T>(localizedName))
             {
                 T data = this.LoadExact<T>(localizedName, useCache: useCache);
                 localizedAssetNames[assetName.Name] = localizedName.Name;
                 return data;
             }
-            catch (ContentLoadException)
+
+            localizedName = new AssetName(assetName.BaseName + "_international", null, null);
+            if (this.DoesAssetExist<T>(localizedName))
             {
-                localizedName = new AssetName(assetName.BaseName + "_international", null, null);
-                try
-                {
-                    T data = this.LoadExact<T>(localizedName, useCache: useCache);
-                    localizedAssetNames[assetName.Name] = localizedName.Name;
-                    return data;
-                }
-                catch (ContentLoadException)
-                {
-                    localizedAssetNames[assetName.Name] = assetName.Name;
-                }
+                T data = this.LoadExact<T>(localizedName, useCache: useCache);
+                localizedAssetNames[assetName.Name] = localizedName.Name;
+                return data;
             }
+
+            localizedAssetNames[assetName.Name] = assetName.Name;
         }
 
         // use cached key