fix: let dialog buttons be links, even though it's not MDC compliant

Author: hperrin

packages/button/Button.svelte

@@ -10,11 +10,14 @@
     class:smui-button--color-secondary={color === 'secondary'}
     class:mdc-card__action={context === 'card:action'}
     class:mdc-card__action--button={context === 'card:action'}
+    class:mdc-dialog__button={context === 'dialog:action'}
     class:mdc-top-app-bar__navigation-icon={context === 'top-app-bar:navigation'}
     class:mdc-top-app-bar__action-item={context === 'top-app-bar:action'}
     class:mdc-snackbar__action={context === 'snackbar'}
     use:Ripple={[ripple, {unbounded: false}]}
     {href}
+    {...actionProp}
+    {...defaultProp}
     {...exclude($$props, ['use', 'class', 'ripple', 'color', 'variant', 'dense', 'href'])}
   ><slot></slot></a>
 {:else}
@@ -64,10 +67,10 @@
 
   let context = getContext('SMUI:button:context');
 
-  $: actionProp = context === 'dialog:action' && action !== null ? {'data-mdc-dialog-action': action} : {};
-  $: defaultProp = context === 'dialog:action' && defaultAction ? {'data-mdc-dialog-button-default': ''} : {};
+  $: actionProp = (context === 'dialog:action' && action !== null) ? {'data-mdc-dialog-action': action} : {};
+  $: defaultProp = (context === 'dialog:action' && defaultAction) ? {'data-mdc-dialog-button-default': ''} : {};
 
-  $: dialogExcludes = context === 'dialog:action' ? ['action', 'default'] : [];
+  $: dialogExcludes = (context === 'dialog:action') ? ['action', 'default'] : [];
 
   setContext('SMUI:label:context', 'button');
   setContext('SMUI:icon:context', 'button');