fix(panel): sticky header

Author: dewita

components/Panel/Panel.vue

@@ -127,7 +127,7 @@
 
   .panel__main {
     .panel__nav__wrapper {
-      position: sticky;
+      position: absolute;
       top: 0;
       left: 0;
       right: 0;

components/Panel/PanelItem.vue

@@ -55,6 +55,7 @@
 <style lang="scss" scoped>
   .panel__item {
     height: calc(100% - 50px);
+    margin-top: 50px;
     overflow-y: scroll;
     overflow-x: hidden;
   }