Made selected bool public

Made bool selected public in order for App.java able to access this information

src/main/java/com/rarchives/ripme/ui/HistoryEntry.java

@@ -12,7 +12,7 @@ public class HistoryEntry {
     public int     count        = 0;
     public Date    startDate    = new Date(),
                    modifiedDate = new Date();
-    boolean       selected     = false;
+    public boolean selected     = false;
 
     public HistoryEntry() {
     }