feat: wrap TreeModelFilter in TreeModelSort

dzgui/controllers/emitter.py

@@ -140,4 +140,8 @@ class Emitter(GObject.GObject):
     def keyword_set(self, keyword: str) -> None:
         pass
 
+    @GObject.Signal(flags=GObject.SignalFlags.RUN_LAST, arg_types=())
+    def log_page_loaded(self) -> None:
+        pass
+
     # TODO: if servers fail to load, may leave dangling widgets waiting for a signal

dzgui/controllers/mc.py

@@ -554,6 +554,9 @@ class Controller(GObject.GObject):
     def get_notebook(self) -> "Notebook":
         return self.mediator.notebook
 
+    def get_prior_page(self) -> NotebookPage:
+        return self.mediator.notebook.get_prior_page()
+
     def get_servers(self) -> "Notebook":
         return self.mediator.servers