[fix](@svelteui/core): remove target='_self' from button anchor behav…

…iour

Using target=_self triggers a full page reload, which renders useless the svelte-kit page load logic

ISSUES CLOSED: #501

packages/svelteui-core/src/components/Button/Button.svelte

@@ -93,7 +93,7 @@ A user can perform an immediate action by pressing a button. It's frequently use
 		})}
 		role="button"
 		rel="noreferrer noopener"
-		target={external ? '_blank' : '_self'}
+		target={external ? '_blank' : ''}
 		{...$$restProps}
 		tabindex="0"
 	>