Make [P]in action toggle save of hashtag timeline

If currently viewed timeline is saved, [P] unsaves it.

toot/tui/app.py

@@ -213,12 +213,16 @@ class TUI(urwid.Frame):
         def _thread(timeline, status):
             self.show_thread(status)
 
-        def _save(timeline, status):
+        def _toggle_save(timeline, status):
             if not timeline.name.startswith("#"):
                 return
             hashtag = timeline.name[1:]
             assert isinstance(local, bool), local
-            self.config.setdefault("timelines", {})[hashtag] = {"local": local}
+            timelines = self.config.setdefault("timelines", {})
+            if hashtag in timelines:
+                del timelines[hashtag]
+            else:
+                timelines[hashtag] = {"local": local}
             config.save_config(self.config)
 
         timeline = Timeline(name, statuses)
@@ -227,7 +231,7 @@ class TUI(urwid.Frame):
         urwid.connect_signal(timeline, "next", _next)
         urwid.connect_signal(timeline, "close", _close)
         urwid.connect_signal(timeline, "thread", _thread)
-        urwid.connect_signal(timeline, "save", _save)
+        urwid.connect_signal(timeline, "save", _toggle_save)
 
         return timeline
 

toot/tui/overlays.py

@@ -145,7 +145,7 @@ class Help(urwid.Padding):
         yield urwid.Divider()
         yield urwid.Text(h("  [Q] - quit toot"))
         yield urwid.Text(h("  [G] - go to - switch timelines"))
-        yield urwid.Text(h("  [P] - save (pin) current timeline"))
+        yield urwid.Text(h("  [P] - save/unsave (pin) current timeline"))
         yield urwid.Text(h("  [H] - show this help"))
         yield urwid.Divider()
         yield urwid.Text(("bold", "Status keys"))