FIX Pass filter fields through the form before using them.

Some form fields such as CurrencyField manipulate the value to give more
pure values, e.g. removing a currency symbol before the actual value.

src/Forms/CurrencyField.php

@@ -30,6 +30,7 @@ public function setValue($value, $data = null)
             . number_format((double)preg_replace('/[^0-9.\-]/', '', $value ?? ''), 2);
         return $this;
     }
+
     /**
      * Overwrite the datavalue before saving to the db ;-)
      * return 0.00 if no value, or value is non-numeric

src/Forms/GridField/GridFieldFilterHeader.php

@@ -116,9 +116,13 @@ public function handleAction(GridField $gridField, $actionName, $arguments, $dat
         $state->Columns = [];
 
         if ($actionName === 'filter') {
-            if (isset($data['filter'][$gridField->getName()])) {
-                foreach ($data['filter'][$gridField->getName()] as $key => $filter) {
-                    $state->Columns->$key = $filter;
+            $filterValues = $data['filter'][$gridField->getName()] ?? null;
+            if ($filterValues !== null) {
+                $form = $this->getSearchForm($gridField);
+                $this->removeSearchPrefixFromFields($form->Fields());
+                $form->loadDataFrom($filterValues);
+                foreach ($filterValues as $fieldName => $rawFilterValue) {
+                    $state->Columns->$fieldName = $form->Fields()->dataFieldByName($fieldName)?->dataValue() ?? $rawFilterValue;
                 }
             }
         }
@@ -498,6 +502,16 @@ private function addSearchPrefixToFields(FieldList $fields): void
         }
     }
 
+    private function removeSearchPrefixFromFields(FieldList $fields): void
+    {
+        foreach ($fields as $field) {
+            $field->setName(str_replace('Search__', '', $field->getName()));
+            if ($field instanceof CompositeField) {
+                $this->removeSearchPrefixFromFields($field->getChildren());
+            }
+        }
+    }
+
     /**
      * Update CSS classes for form fields, including nested inside composite fields
      */