MoultiLog: do not maximize the container.

`self.screen.maximize(self)` used to maximize only the log widget, despite the
`container` parameter defaulting to `True`.
Starting with Textual 0.85.0, `container=True` actually maximizes the
containing widget (i.e. the parent step).
Explicitly setting `False` restores the expected behaviour.

src/moulti/widgets/moultilog.py

@@ -56,7 +56,7 @@ def set_max_height(self, new_max_height: int|None) -> int|None:
 	def action_maximize(self) -> None:
 		self.max_height_backup = self.styles.max_height
 		self.styles.max_height = '99h' # Leave some room for the search widget
-		self.screen.maximize(self)
+		self.screen.maximize(self, False)
 		self.refresh_bindings()
 
 	def action_minimize(self) -> None: