room-history: Update strings for creation event

src/session/view/content/room_history/state/creation.rs

@@ -54,12 +54,12 @@ mod imp {
                 ));
                 self.previous_room_btn.set_visible(true);
                 self.description
-                    .set_label(&gettext("This is the continuation of an upgraded room."));
+                    .set_label(&gettext("This conversation started in another room."));
             } else {
                 self.previous_room_btn.set_visible(false);
                 self.previous_room_btn.set_action_name(None);
                 self.description
-                    .set_label(&gettext("This is the beginning of this room."));
+                    .set_label(&gettext("The conversation starts here."));
             }
         }
     }

src/session/view/content/room_history/state/creation.ui

@@ -17,7 +17,7 @@
           <object class="GtkButton" id="previous_room_btn">
             <property name="can-shrink">true</property>
             <property name="action-name">session.show-room</property>
-            <property name="label" translatable="yes">Previous room</property>
+            <property name="label" translatable="yes">View</property>
           </object>
         </child>
       </object>