fix hidden left icons when expert mode is altered several times

whereas a tool is embedded (#14440)

1 files changed, 6 insertions, 2 deletions

diff --git a/control-center b/control-center
index 7e27ae57..defba586 100755
--- a/control-center
+++ b/control-center
@@ -1261,7 +1261,7 @@ my $spacing = 25;
 
 my %tool_callbacks;
 
-my ($page_count, $need_to_refresh);
+my ($page_count, $need_to_refresh, $is_freezed);
 
 sub really_refresh_tree {
     my $pos = $notebook_global->get_current_page;
@@ -1272,6 +1272,7 @@ sub really_refresh_tree {
     # restore previous position:
     $notebook_global->set_current_page($pos);
     $notebook_global->window && $notebook_global->window->thaw_updates;
+    $is_freezed = 0;
 }
 
 sub request_url {
@@ -1283,7 +1284,10 @@ sub request_url {
 sub refresh_tree {
     my ($mode) = @_;
     if ($mode && $page_count) {
-        $notebook_global->window and $notebook_global->window->freeze_updates;
+        if (!$is_freezed && $notebook_global->window) {
+            $notebook_global->window->freeze_updates;
+            $is_freezed = 1;
+        }
         $notebook_global->remove_page(-1) foreach 0..$page_count-1;
         $page_count = 0;
     }