[PBNTR-490] Fixing minimizing the dropdown when clicking outside (#3688)

**What does this PR do?**
Fixing dropdown doesn't minimize when clicking outside of the field.

**How to test?** Steps to confirm the desired behavior:
1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See addition/change


#### Checklist:
- [x] **LABELS** Add a label: `enhancement`, `bug`, `improvement`, `new
kit`, `deprecated`, or `breaking`. See [Changelog &
Labels](https://github.com/powerhome/playbook/wiki/Changelog-&-Labels)
for details.
- [x] **DEPLOY** I have added the `milano` label to show I'm ready for a
review.
- [ ] **TESTS** I have added test coverage to my code.

playbook/app/pb_kits/playbook/pb_multi_level_select/_multi_level_select.tsx

@@ -88,6 +88,9 @@ const MultiLevelSelect = (props: MultiLevelSelectProps) => {
     item: []
   })
 
+  const arrowDownElementId = `arrow_down_${id}`
+  const arrowUpElementId = `arrow_up_${id}`
+
   const modifyRecursive = (tree: { [key: string]: any }[], check: boolean) => {
     if (!Array.isArray(tree)) {
       return
@@ -173,7 +176,12 @@ const MultiLevelSelect = (props: MultiLevelSelectProps) => {
   useEffect(() => {
     // Function to handle clicks outside the dropdown
     const handleClickOutside = (event: any) => {
-      if (dropdownRef.current && !dropdownRef.current.contains(event.target)) {
+      if (
+        dropdownRef.current &&
+        !dropdownRef.current.contains(event.target) &&
+        event.target.id !== arrowDownElementId &&
+        event.target.id !== arrowUpElementId
+      ) {
         setIsDropdownClosed(true)
       }
     }
@@ -260,7 +268,6 @@ const MultiLevelSelect = (props: MultiLevelSelectProps) => {
 
   // Handle click on input wrapper(entire div with pills, typeahead, etc) so it doesn't close when input or form pill is clicked
   const handleInputWrapperClick = (e: any) => {
-    e.stopPropagation()
     if (
       e.target.id === "multiselect_input" ||
       e.target.classList.contains("pb_form_pill_tag")
@@ -518,16 +525,20 @@ const MultiLevelSelect = (props: MultiLevelSelectProps) => {
           </div>
 
           {isDropdownClosed ? (
-            <div key="chevron-down">
+            <div id={arrowDownElementId}
+                key="chevron-down">
               <Icon
                   icon="chevron-down"
+                  id={arrowDownElementId}
                   size="xs"
               />
             </div>
           ) : (
-            <div key="chevron-up">
+            <div id={arrowUpElementId}
+                key="chevron-up">
               <Icon
                   icon="chevron-up"
+                  id={arrowUpElementId}
                   size="xs"
               />
             </div>