MOBILE-4470 refresh: Fix some spinner colors and hidden

src/theme/components/collapsible-header.scss

@@ -93,6 +93,10 @@ body:not(.core-iframe-fullscreen) .collapsible-header-page {
 
         ion-content {
             --offset-top: var(--collapsible-header-collapsed-height) !important;
+
+            > ion-refresher {
+                z-index: 1;
+            }
         }
 
         .collapsible-header-expanded {

src/theme/components/ion-loading.scss

@@ -1,4 +1,5 @@
-ion-loading {
+ion-loading.ios,
+ion-loading.md {
     --spinner-color: var(--core-loading-spinner);
     --border-radius: var(--modal-radius);
 

src/theme/components/ion-spinner.scss

@@ -1,6 +1,4 @@
 ion-spinner,
 ion-refresher {
-    --ion-color-base: var(--core-loading-spinner);
-    --ion-color-primary: var(--core-loading-spinner);
     --color: var(--core-loading-spinner);
 }