Adding per client borders and hotkey to cycle through clients

src/Eve-O-Preview/Services/Interface/IThumbnailManager.cs

@@ -1,4 +1,6 @@
-namespace EveOPreview.Services
+using EveOPreview.View;
+
+namespace EveOPreview.Services
 {
 	public interface IThumbnailManager
 	{
@@ -7,5 +9,9 @@
 
 		void UpdateThumbnailsSize();
 		void UpdateThumbnailFrames();
+
+		IThumbnailView GetClientByTitle(string title);
+		IThumbnailView GetClientByPointer(System.IntPtr ptr);
+		IThumbnailView GetActiveClient();
 	}
 }