- added function to mark a channel for swapping + swap with current channel

- replaced misuse of "FileLoadException" with a custom LoaderException to handle file loading issues with better continue/fail logic
- removed "Save As" and replaced it with "Convert list" menu item that shows information on how to use a reference list instead of direct conversion

source/ChanSort.Loader.Philips/BinarySerializer.cs

@@ -76,7 +76,6 @@ namespace ChanSort.Loader.Philips
       this.Features.CanLockChannels = true;
       this.Features.CanHideChannels = false;
       this.Features.DeleteMode = DeleteMode.NotSupported;
-      this.Features.CanSaveAs = false;
       this.Features.CanHaveGaps = false;
       this.Features.FavoritesMode = FavoritesMode.Flags; // satellite favorites are stored in a separate file that may support independent sorting, but DVB C/T only have a flag
       this.Features.MaxFavoriteLists = 1; // Map45 format will change this

source/ChanSort.Loader.Philips/XmlSerializer.cs

@@ -106,7 +106,6 @@ namespace ChanSort.Loader.Philips
       this.Features.CanLockChannels = true;
       this.Features.CanHideChannels = true;
       this.Features.DeleteMode = DeleteMode.NotSupported;
-      this.Features.CanSaveAs = false;
       this.Features.AllowGapsInFavNumbers = false;
       this.Features.CanEditFavListNames = true;