Debugger: diplay the module list in Dev mode as well. (#6959)

* Debugger: diplay the module list in Dev mode as well.

* Debugger: display full module list when connected or in dev mode.

@see https://github.com/Automattic/jetpack/pull/6959/files#r111185643

class.jetpack-debugger.php

@@ -298,13 +298,6 @@ public static function jetpack_debug_display_handler() {
 							__( 'The primary connection is owned by <strong>%s</strong>\'s WordPress.com account.', 'jetpack' ),
 							esc_html( Jetpack::get_master_user_email() )
 						); ?></p>
-						<?php if ( current_user_can( 'jetpack_manage_modules' ) ) {
-							printf(
-								'<p><a href="%1$s">%2$s</a></p>',
-								Jetpack::admin_url( 'page=jetpack_modules' ),
-								esc_html__( 'Access the full list of Jetpack modules available on your site.', 'jetpack' )
-							);
-						} ?>
 					</div>
 				<?php else : ?>
 					<div id="dev-mode-details">
@@ -314,6 +307,16 @@ public static function jetpack_debug_display_handler() {
 						); ?></p>
 					</div>
 				<?php endif; ?>
+				<?php if (
+					current_user_can( 'jetpack_manage_modules' )
+					&& ( Jetpack::is_development_mode() || Jetpack::is_active() )
+				) {
+					printf(
+						'<p><a href="%1$s">%2$s</a></p>',
+						Jetpack::admin_url( 'page=jetpack_modules' ),
+						esc_html__( 'Access the full list of Jetpack modules available on your site.', 'jetpack' )
+					);
+				} ?>
 			</div>
 			<div id="contact-message" <?php if( ! isset( $_GET['contact'] ) ) {?>  style="display:none" <?php } ?>>
 			<?php if ( self::is_jetpack_support_open() ): ?>