fix: SearchView: Remove overlay

Fixes #11412

gajim/data/gui/chat_paned.ui

@@ -234,22 +234,8 @@
       <object class="GtkGrid" id="right_grid">
         <property name="visible">True</property>
         <property name="can-focus">False</property>
-        <property name="hexpand">True</property>
-        <property name="vexpand">True</property>
         <child>
-          <object class="GtkOverlay" id="right_grid_overlay">
-            <property name="visible">True</property>
-            <property name="can-focus">False</property>
-            <property name="hexpand">True</property>
-            <property name="vexpand">True</property>
-            <child>
-              <placeholder/>
-            </child>
-          </object>
-          <packing>
-            <property name="left-attach">0</property>
-            <property name="top-attach">0</property>
-          </packing>
+          <placeholder/>
         </child>
       </object>
       <packing>

gajim/gtk/builder.pyi

@@ -242,7 +242,6 @@ class ChatPanedBuilder(Builder):
     filter_bar: Gtk.Box
     chat_list_scrolled: Gtk.ScrolledWindow
     right_grid: Gtk.Grid
-    right_grid_overlay: Gtk.Overlay
 
 
 class ContactInfoBuilder(Builder):

gajim/gtk/chat_page.py

@@ -60,7 +60,7 @@ class ChatPage(Gtk.Box):
         self._ui.connect_signals(self)
 
         self._chat_stack = ChatStack()
-        self._ui.right_grid_overlay.add(self._chat_stack)
+        self._ui.right_grid.attach(self._chat_stack, 0, 0, 1, 1)
 
         self._chat_control = self._chat_stack.get_chat_control()
 
@@ -69,11 +69,12 @@ class ChatPage(Gtk.Box):
 
         self._search_revealer = Gtk.Revealer()
         self._search_revealer.set_reveal_child(False)
+        self._search_revealer.set_hexpand(False)
+        self._search_revealer.set_hexpand_set(True)
         self._search_revealer.set_transition_type(
             Gtk.RevealerTransitionType.SLIDE_LEFT)
-        self._search_revealer.set_halign(Gtk.Align.END)
         self._search_revealer.add(self._search_view)
-        self._ui.right_grid_overlay.add_overlay(self._search_revealer)
+        self._ui.right_grid.attach(self._search_revealer, 1, 0, 1, 1)
 
         self._chat_filter = ChatFilter(icons=True)
         self._ui.filter_bar.add(self._chat_filter)