fix: Button remove color-primary-element-lighter and use default st…

…yling

Default style is `secondary` so we can simply remove the old styling and
set it to the same as secondary.

Signed-off-by: Ferdinand Thiessen <rpm@fthiessen.de>

src/components/NcButton/NcButton.vue

@@ -412,16 +412,16 @@ export default {
 	}
 
 	// Default button type
-	background-color: var(--color-primary-element-lighter), var(--color-primary-element-light);
 	color: var(--color-primary-light-text);
+	background-color: var(--color-primary-light);
 	&:hover:not(:disabled) {
 		background-color: var(--color-primary-light-hover);
 	}
 
 	// Back to the default color for this button when active
 	// TODO: add ripple effect
 	&:active {
-		background-color: var(--color-primary-element-lighter), var(--color-primary-element-light);
+		background-color: var(--color-primary-element-light);
 	}
 
 	&__wrapper {