Show Captcha after click on edit over buttons on EditPage

Insert Captcha direct after click on Edit over editpage buttons, instead of
show after click on save. If the captcha was incorrect or empty, show
error message at old captcha position.

Bug: 19648
Change-Id: Ia3bb66f98aa84bb6efb7a1e42fbc203b401e99b8
Merge "Show Captcha after click on edit over buttons on EditPage"