Footer remove page

I added a remove page function to the footer for plugins that make use
of it.

ocarina/footer.py

@@ -34,6 +34,14 @@ def add_page(title, widget):
 	pages[title] = widget
 	tabs.append_page(widget, label)
 
+def remove_page(title):
+	page = pages.get(title, None)
+	if page == None:
+		return
+	n = tabs.page_num(page)
+	tabs.remove_page(n)
+	del pages[title]
+
 def up_button():
 	tabs.show()
 	bar.hide()