Fix #100

Using self.panel.hide() without calling
curses.panel.update_panels() before next refresh can really mess
stuff up. As far as I can tell, this was the real cause of #100.

This changes that call to the Modal's hide method instead, which
will keep this sort of issue from coming up again (hopefully)

toot/ui/app.py

@@ -260,7 +260,7 @@ def __init__(self, stdscr):
         self.window = curses.newwin(height, width, y, x)
         self.draw()
         self.panel = curses.panel.new_panel(self.window)
-        self.panel.hide()
+        self.hide()
 
     def get_content(self):
         raise NotImplementedError()
@@ -346,7 +346,7 @@ def __init__(self, stdscr, title, footer=None, size=(None, None), default=None):
 
         self.draw()
         self.panel = curses.panel.new_panel(self.window)
-        self.panel.hide()
+        self.hide()
 
     def get_size_pos(self, stdscr):
         screen_height, screen_width = stdscr.getmaxyx()