Styling fixes on harvest page

assets/css/app.css

@@ -7,6 +7,7 @@
 @import './live/registration.css';
 @import './pages/privacy.css';
 @import './live/table.css';
+@import './live/yield.css';
 
 /* Alerts and form errors used by phx.new */
 .alert {

assets/css/live/yield.css

@@ -0,0 +1,9 @@
+.date-picker {
+  display: flex;
+  align-items: baseline;
+  gap: 0.7em;
+}
+
+.date-picker select {
+  max-width: 8rem;
+}