Merge pull request #2294 from weseek/imprv/with-scrollbar

change to show scrollbar when modal's showing

src/client/styles/scss/_layout.scss

@@ -1,3 +1,7 @@
+body {
+  overflow-y: scroll !important;
+}
+
 .grw-logo {
   svg {
     width: $grw-logo-width;
@@ -15,6 +19,12 @@
   margin-top: $grw-navbar-height + $grw-navbar-border-width;
 }
 
+.modal-open:not(.on-edit) {
+  position: fixed;
+  width: 100%;
+  padding-right: 0 !important;
+}
+
 .grw-modal-head {
   font-size: 1em;
   border-bottom: 1px solid $gray-500;