Fix: Modal Z-index (#1778)

* bring modal on top of Sidebar

* updated changelog

Author: sadakchap

CHANGELOG.md

@@ -11,6 +11,7 @@
 - fix: date cell value not selected on double clicks (fn-faisal) [#1730](https://github.com/parse-community/parse-dashboard/pull/1730)
 
 ## Fixes
+- Fixed bug when opening a big modal, modal content is not visible due to Sidebar (Prerna Mehra) [#1777](https://github.com/parse-community/parse-dashboard/pull/1778)
 - Fixed UI for a field containing an array of pointers (Prerna Mehra) [#1776](https://github.com/parse-community/parse-dashboard/pull/1776)
 - Fixed bug when editing or copying a field containing an array of pointers [#1770](https://github.com/parse-community/parse-dashboard/issues/1770) (Prerna Mehra) [#1771](https://github.com/parse-community/parse-dashboard/pull/1771)
 

src/components/Popover/Popover.scss

@@ -14,7 +14,7 @@
   bottom: 0;
   right: 0;
   pointer-events: none;
-  z-index: 6;
+  z-index: 100; // This is just +1 z-index of Sidebar
 
   & > div {
     position: absolute;