views: Rework direct messages button UI.

This commit reworks the direct messages button by moving it to a
different section between the menu and the streams panel. This is done
in preparation for the addition of a direct messages panel showing the
DM's with different users.

Author: theViz343

zulipterminal/ui_tools/views.py

@@ -773,19 +773,17 @@ def __init__(self, view: Any) -> None:
         self.view = view
         self.controller = view.controller
         self.menu_v = self.menu_view()
+        self.pm_v = self.pm_view()
         self.stream_v = self.streams_view()
 
         self.is_in_topic_view = False
-        contents = [(4, self.menu_v), self.stream_v]
+        contents = [(3, self.menu_v), (2, self.pm_v), self.stream_v]
         super().__init__(contents)
 
     def menu_view(self) -> Any:
         count = self.model.unread_counts.get("all_msg", 0)
         self.view.home_button = HomeButton(controller=self.controller, count=count)
 
-        count = self.model.unread_counts.get("all_pms", 0)
-        self.view.pm_button = PMButton(controller=self.controller, count=count)
-
         self.view.mentioned_button = MentionedButton(
             controller=self.controller,
             count=self.model.unread_counts["all_mentions"],
@@ -798,13 +796,22 @@ def menu_view(self) -> Any:
         )
         menu_btn_list = [
             self.view.home_button,
-            self.view.pm_button,
             self.view.mentioned_button,
             self.view.starred_button,
         ]
         w = urwid.ListBox(urwid.SimpleFocusListWalker(menu_btn_list))
         return w
 
+    def pm_view(self) -> Any:
+        count = self.model.unread_counts.get("all_pms", 0)
+        self.view.pm_button = PMButton(controller=self.controller, count=count)
+        self.view.pm_w = urwid.ListBox(
+            urwid.SimpleFocusListWalker(
+                [urwid.Divider(div_char=COLUMN_TITLE_BAR_LINE), self.view.pm_button]
+            )
+        )
+        return self.view.pm_w
+
     def streams_view(self) -> Any:
         streams_btn_list = [
             StreamButton(
@@ -894,11 +901,11 @@ def update_stream_view(self) -> None:
 
     def show_stream_view(self) -> None:
         self.is_in_topic_view = False
-        self.contents[1] = (self.stream_v, self.options(height_type="weight"))
+        self.contents[2] = (self.stream_v, self.options(height_type="weight"))
 
     def show_topic_view(self, stream_button: Any) -> None:
         self.is_in_topic_view = True
-        self.contents[1] = (
+        self.contents[2] = (
             self.topics_view(stream_button),
             self.options(height_type="weight"),
         )
@@ -907,7 +914,7 @@ def keypress(self, size: urwid_Size, key: str) -> Optional[str]:
         if is_command_key("SEARCH_STREAMS", key) or is_command_key(
             "SEARCH_TOPICS", key
         ):
-            self.focus_position = 1
+            self.focus_position = 2
             if self.is_in_topic_view:
                 self.view.topic_w.keypress(size, key)
             else: