Use clear and send_keys instead of action chains in page object methods

common/test/acceptance/pages/studio/component_editor.py

 from bok_choy.page_object import PageObject
 from selenium.webdriver.common.keys import Keys
-from selenium.webdriver.common.action_chains import ActionChains
 from utils import click_css
 from selenium.webdriver.support.ui import Select
 
@@ -57,12 +56,12 @@ class ComponentEditorView(PageObject):
         Sets the text field with given label (display name) to the specified value, and presses Save.
         """
         elem = self.get_setting_element(label)
-        # Click in the field, delete the value there.
-        action = ActionChains(self.browser).click(elem)
-        for _x in range(0, len(elem.get_attribute('value'))):
-            action = action.send_keys(Keys.BACKSPACE)
-        # Send the new text, then Tab to move to the next field (so change event is triggered).
-        action.send_keys(value).send_keys(Keys.TAB).perform()
+
+        # Clear the current value, set the new one, then
+        # Tab to move to the next field (so change event is triggered).
+        elem.clear()
+        elem.send_keys(value)
+        elem.send_keys(Keys.TAB)
         self.save()
 
     def set_select_value_and_save(self, label, value):