fix(logout) : fix z-index signIn/Up modals

src/app/shared/components/signin-modal/signin-modal.component.scss

@@ -5,7 +5,7 @@
 @import '../../../../assets/scss/hyperlink';
 .cModal {
   position: fixed;
-  z-index: $modal-add-structure-z-index;
+  z-index: $modal-authent-z-index;
   top: 0;
   right: 0;
   bottom: 0;

src/app/shared/components/signup-modal/signup-modal.component.scss

@@ -5,7 +5,7 @@
 @import '../../../../assets/scss/hyperlink';
 .cModal {
   position: fixed;
-  z-index: $modal-add-structure-z-index;
+  z-index: $modal-authent-z-index;
   top: 0;
   right: 0;
   bottom: 0;

src/assets/scss/_z-index.scss

@@ -3,3 +3,4 @@ $modal-add-structure-z-index: 1002;
 $modal-filter-structure-z-index: 1002;
 $modal-menu-phone-z-index: 1002;
 $btn-phone-switch-map-list-z-index: 1001;
+$modal-authent-z-index: 1003;