Fix datepicker icon + add dash line in line chart

assets/scss/datepicker.scss

@@ -66,6 +66,10 @@
           }
         }
       }
+      
+      .v-icon {
+        color: map-deep-get($config, #{$theme}, "v-icon-chevron-down") !important;
+      }
     }
 
     .v-input__custom {