capitalize all button text

Signed-off-by: Arthur Lu <learthurgo@gmail.com>

scripts/dialog.js

@@ -14,8 +14,8 @@ export class Dialog extends HTMLElement {
 			</form>
 			<hr>
 			<div class="btn-group">
-				<button value="cancel" form="form">Cancel</button>
-				<button value="confirm" form="form">Confirm</button>
+				<button value="cancel" form="form">CANCEL</button>
+				<button value="confirm" form="form">CONFIRM</button>
 			</div>
 		</dialog>
 		`;