Reporter not allowed changing Reporter when limit_reporters = ON

When reporters are limited to their own issues and allowed to update
issues, they are able to change the issue's reporter (and gain
visibility on existence of other reporters).

This commit fixes the problem by only displaying the current reporter's
name (i.e without the [edit] ajax) when $g_limit_reporters = ON and the
current user's access level is greater than REPORTER.

Fixes #15770

bug_update_advanced_page.php

@@ -214,13 +214,22 @@
 		echo '<td class="category">', lang_get( 'reporter' ), '</td>';
 		echo '<td>';
 
-		if ( ON == config_get( 'use_javascript' ) ) {
-			$t_username = prepare_user_name( $tpl_bug->reporter_id );
-			echo ajax_click_to_edit( $t_username, 'reporter_id', 'entrypoint=issue_reporter_combobox&issue_id=' . $tpl_bug_id );
+		# Do not allow the bug's reporter to edit the Reporter field
+		# when limit_reporters is ON
+		if( ON === config_get( 'limit_reporters' )
+		&&  !access_has_project_level( REPORTER + 1, $tpl_bug->project_id )
+		) {
+			echo string_attribute( user_get_name( $tpl_bug->reporter_id ) );
 		} else {
-			echo '<select ', helper_get_tab_index(), ' name="reporter_id">';
-			print_reporter_option_list( $tpl_bug->reporter_id, $tpl_bug->project_id );
-			echo '</select>';
+
+			if ( ON == config_get( 'use_javascript' ) ) {
+				$t_username = prepare_user_name( $tpl_bug->reporter_id );
+				echo ajax_click_to_edit( $t_username, 'reporter_id', 'entrypoint=issue_reporter_combobox&issue_id=' . $tpl_bug_id );
+			} else {
+				echo '<select ', helper_get_tab_index(), ' name="reporter_id">';
+				print_reporter_option_list( $tpl_bug->reporter_id, $tpl_bug->project_id );
+				echo '</select>';
+			}
 		}
 
 		echo '</td>';