Task/decrease border radius of dialogs (#6680)

Decrease border radius of dialogs

apps/client/src/styles/theme.scss

@@ -341,6 +341,7 @@ $_tertiary: map.merge(map.get($_palettes, tertiary), $_rest);
   @include mat.dialog-overrides(
     (
       container-max-width: 80vw,
+      container-shape: 8px,
       container-small-max-width: 96vw
     )
   );