fixed datepicker clipped input borders

ui/src/scss/_flatpickr.scss

@@ -22,6 +22,7 @@
     box-shadow: none;
     min-height: 0;
     height: var(--inputHeight);
+    background: none;
     border-radius: var(--baseRadius);
     border: 1px solid var(--baseAlt1Color);
   }
@@ -156,7 +157,6 @@
      -moz-user-select: none;
       -ms-user-select: none;
           user-select: none;
-  overflow: hidden;
   -webkit-box-flex: 1;
   -webkit-flex: 1;
       -ms-flex: 1;