Allow for jpegs and attempt to not mess shortcuts form other apps

Co-Authored-By: David Ross Smith <5095074+dragredsim@users.noreply.github.com>

UWPHook/AppEntry.cs

@@ -87,8 +87,10 @@ namespace UWPHook
 
             try
             {
-                //Get every png in this directory, Steam only allows for .png's
+                //Get every png, jpg or jpeg in this directory, Steam only allows for .png's but jpgs work too
                 images.AddRange(Directory.GetFiles(_icon_path, "*.png"));
+                images.AddRange(Directory.GetFiles(_icon_path, "*.jpg"));
+                images.AddRange(Directory.GetFiles(_icon_path, "*.jpeg"));
             }
             catch (DirectoryNotFoundException)
             {

UWPHook/GamesWindow.xaml.cs

@@ -478,7 +478,7 @@ namespace UWPHook
                                 {
                                     Log.Verbose(shortcuts[i].ToString());
 
-                                    if (shortcuts[i].AppName == app.Name)
+                                    if (shortcuts[i].AppName == app.Name && shortcuts[i].Exe == exePath)
                                     {
                                         shortcutAlreadyExists = true;
                                         Log.Verbose(app.Name + " already added to Steam. Updating existing shortcut.");