Updated selectors.

Changed how watchlists are updated. Watchlists of the same name are now removed prior to creating a new one of the same name.
Changed how checkboxes work because of changes in DOM for the  alert dialog as well for the input/properties dialog of strategies.
Added a warning to gracefully catch setting a webhook on the alert dialog while 2fa is disabled.

Signed-off-by: timelyart <[email protected]>