Same work around for the search overlay in Chrome for Android

src/pyj/read_book/search.pyj

@@ -55,6 +55,10 @@ def container(self):
     def search_text(self):
         return self.container.querySelector('input').value
 
+    @property
+    def is_visible(self):
+        return self.container.style.display is not 'none'
+
     def hide(self):
         self.container.style.display = 'none'
 

src/pyj/read_book/view.pyj

@@ -392,7 +392,7 @@ def on_next_section(self, data):
             self.goto_named_destination(toc_node.dest, toc_node.frag)
 
     def on_update_cfi(self, data):
-        if self.overlay.is_visible:
+        if self.overlay.is_visible or self.search_overlay.is_visible:
             # Chrome on Android stupidly resizes the viewport when the on
             # screen keyboard is displayed. This means that the push_state()
             # below causes the overlay to be closed, making it impossible to