Fix user defined radius (#10327)

- Observe correct radius values
- Closes https://github.com/inventree/InvenTree/issues/10322

src/frontend/lib/types/Core.tsx

@@ -1,4 +1,4 @@
-import type { MantineSize } from '@mantine/core';
+import type { MantineRadius, MantineSize } from '@mantine/core';
 
 export type UiSizeType = MantineSize | string | number;
 
@@ -6,7 +6,7 @@ export interface UserTheme {
   primaryColor: string;
   whiteColor: string;
   blackColor: string;
-  radius: UiSizeType;
+  radius: MantineRadius;
   loader: string;
 }