Show a link to password reset from password change and delete account (#862)

It's helpful when you forgot your password thus cannot change it
(can happen if you log in via OAuth2 or OpenID)

Also make sure that both the delete-account and password-change
links to forgot-password will have the primary email pre-filled

templates/user/settings/password.tmpl

@@ -29,6 +29,7 @@
 
 						<div class="field">
 							<button class="ui green button">{{$.i18n.Tr "settings.change_password"}}</button>
+							<a href="{{AppSubUrl}}/user/forget_password?email={{.Email}}">{{.i18n.Tr "auth.forget_password"}}</a>
 						</div>
 					</form>
 					{{else}}