Manage Pledge: Update email dialog to use JS submission (#104)

Use the proper dialog behavior for submitting an email to generate a manage link.

Fixes #98.

plugins/wporg-5ftf/views/modal-request-manage-link.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace WordPressDotOrg\FiveForTheFuture\View;
+
+defined( 'WPINC' ) || die();
+
+?>
+<script type="text/template" id="tmpl-5ftf-send-link-dialog">
+	<div id="send-link-dialog-bg" class="pledge-dialog__background" hidden data-no-inert></div>
+	<div id="send-link-dialog" role="dialog" class="pledge-dialog" hidden tabindex="-1" aria-label="<?php esc_attr_e( 'Request to edit this pledge', 'wporg-5ftf' ); ?>">
+		<p>
+			<?php esc_html_e( 'Only pledge admins can edit pledges.', 'wporg-5ftf' ); ?>
+		</p>
+
+		<p>
+			<?php esc_html_e( "If you're the admin, enter your email address and a confirmation link will be sent to you.", 'wporg-5ftf' ); ?>
+		</p>
+
+		<form method="post">
+			<input type="hidden" name="pledge_id" value="<?php echo esc_attr( get_post()->ID ); ?>" />
+
+			<label for="pledge_admin_address">
+				<?php esc_html_e( 'Email Address', 'wporg-5ftf' ); ?>
+			</label>
+
+			<input
+				id="pledge_admin_address"
+				name="pledge_admin_address"
+				type="email"
+				required
+				value=""
+			/>
+
+			<div class="message"></div>
+
+			<input
+				type="submit"
+				name="get_manage_pledge_link"
+				value="<?php esc_attr_e( 'Submit', 'wporg-5ftf' ); ?>"
+			/>
+		</form>
+		<button type="button" class="button button-link pledge-dialog__close" aria-label="Close"><span class="dashicons dashicons-no-alt" aria-hidden="true"></span></button></div>
+	</div>
+</script>