In WAB 1.2 in the attribute table widget.js file i can adjust the default size of the attribute table by changing
setInitialPosition: function() {
var h, b;
if (this.position.height) {
h = this.position.height;
} else {
h = document.body.clientHeight;
h = h / 5;
}
In WAB 2.1 it is different and i'm not sure what to change to make the default size smaller.
Thanks