feat: slides template white background (lighter as grey)

Signed-off-by: peterpeterparker <[email protected]>

Author: peterpeterparker

studio/src/app/popovers/editor/app-create-slide/app-create-slide.scss

@@ -16,9 +16,11 @@ app-create-slide {
       height: fit-content;
       overflow: hidden;
 
-      background: var(--ion-color-light);
+      background: white;
       border: 1px solid #dedede;
 
+      box-shadow: rgba(0, 0, 0, 0.12) 0 1px 4px;
+
       div.expand-charts {
         transition: max-height 0.7s ease-in-out;
         overflow: hidden;