Wrap selector logic in try..except statement

This catches all errors that are thrown, when any
`find_element_by_*` method fails for some reason.
If this happens, we just fall through and wait for
a page refresh and then try again.

deletefb/deletefb.py

@@ -103,6 +103,7 @@ def delete_posts(user_email_address,
     driver.get(user_profile_url)
 
     for _ in range(MAX_POSTS):
+        try:
             post_button_sel = "_4xev"
             timeline_element = driver.find_element_by_class_name(post_button_sel)
             actions = ActionChains(driver)
@@ -124,6 +125,8 @@ def delete_posts(user_email_address,
 
             # Facebook would not let me get focus on this button without some custom JS
             driver.execute_script("arguments[0].click();", confirmation_button)
+        except:
+            pass
 
         # Required to sleep the thread for a bit after using JS to click this button
         time.sleep(5)