diff --git a/apps/common/main/resources/less/toolbar.less b/apps/common/main/resources/less/toolbar.less
index 2c6254779..6b40f298a 100644
--- a/apps/common/main/resources/less/toolbar.less
+++ b/apps/common/main/resources/less/toolbar.less
@@ -156,6 +156,8 @@
     }
 
     .box-panels {
+        flex-grow: 1;
+
         .panel:not(.active) {
             display: none;
         }