Add Forgot Password to Login Widget Block

[ellucinda]

Can you please add a lost/forgot password option to the login widget.

[imath]

I believe it's a good idea, let's add this link to the Login Form Widget Block.

[imath]

8100.patch is adding support for the forgot password link:

• There's a new setting available from the widget screen, as shown in the above screen capture.
• If the setting is active, then the login form displays the link under the Log In button, as shown in the below screen capture.

The code has been already added to the ​BP Blocks plugin.

[imath]

In 13111:

BP Blocks: add a link to reset the user password into the Login Form

• add a setting to let the Admin choose whether to show this link from the block’s inspector settings.
• Include this link under the "Log In" button if this setting is active.

Props ellucinda

Fixes #8100