Merge pull request #1882 from sanajitjana

* pr/1882:
  Reduce z-index for modal and popup components to maintain consistent stacking order

Closes gh-1882

Author: mhalbritter

start-client/src/styles/favorite.scss

@@ -7,7 +7,7 @@ $w2: 500px;
 
 .modal-add-favorite,
 .modal-favorite {
-  z-index: 10000;
+  z-index: 999;
   position: fixed;
   top: 50px;
   left: 0;

start-client/src/styles/history.scss

@@ -5,7 +5,7 @@ $w_arrow: 12px;
 $w: 1000px;
 
 .modal-share {
-  z-index: 10000;
+  z-index: 999;
   position: fixed;
   top: 50px;
   left: 0;

start-client/src/styles/share.scss

@@ -5,7 +5,7 @@ $w_arrow: 12px;
 $w: 500px;
 
 .popup-share {
-  z-index: 10000;
+  z-index: 999;
   position: fixed;
   top: 50%;
   margin-top: -150px;