LibWeb: Add imports to all IDL files that depend on others

Author: https://github.com/alimpfard
Commit: a59800b4a0
Pull-request: https://github.com/SerenityOS/serenity/pull/12548
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/linusg

Userland/Libraries/LibWeb/SVG/SVGElement.idl

@@ -1,3 +1,6 @@
+#import <DOM/Element.idl>
+#import <HTML/DOMStringMap.idl>
+
 interface SVGElement : Element {
     // FIXME: This should come from a HTMLOrSVGElement mixin
     [SameObject] readonly attribute DOMStringMap dataset;