room-details: Add translator comments

data/resources/ui/content-audio-history-viewer.ui

@@ -8,6 +8,7 @@
           <object class="GtkHeaderBar">
             <property name="title-widget">
               <object class="AdwWindowTitle">
+                <!-- Translators: As in 'Audio file'. -->
                 <property name="title" translatable="yes">Audio</property>
               </object>
             </property>

data/resources/ui/content-room-details-general-page.ui

@@ -173,6 +173,7 @@
                     </child>
                     <child>
                       <object class="AdwActionRow">
+                        <!-- Translators: As in 'Audio file'. -->
                         <property name="title" translatable="yes">Audio</property>
                         <property name="action-name">details.next-page</property>
                         <property name="action-target">'audio-history'</property>

src/session/content/room_details/mod.rs

@@ -297,11 +297,12 @@ impl RoomDetails {
                     audio_page
                 };
 
+                // Translators: As in 'Audio file'.
                 self.set_title(Some(&gettext("Audio")));
                 imp.main_stack.set_visible_child(&audio_page);
             }
             PageName::None => {
-                warn!("Can't switch to PageName::None");
+                warn!("Can’t switch to PageName::None");
             }
         }