Add workaround for Blazorise picker positioning issue

Author: maliming

framework/src/Volo.Abp.BlazoriseUI/wwwroot/volo.abp.blazoriseui.css

@@ -61,4 +61,11 @@
 
 .table-responsive .dropdown-menu-position-strategy-fixed {
     position: fixed !important;
-}
+}
+
+/* 
+    blazorise picker workaround for https://github.com/Megabit/Blazorise/issues/4917
+*/
+.card .flatpickr-calendar.static {
+    top: unset !important;
+}