Fix: Resolve implicit any and property access errors in core components

src/lib/elements/element_input_files_tbl.svelte

@@ -258,14 +258,14 @@
         return processed_file_list;
     }
 
-    function remove_file_from_filelist(index) {
+    function remove_file_from_filelist(index: number) {
         console.log('*** remove_file_from_filelist() ***');
 
         // Can not use something like this because it is readonly:
         const dt = new DataTransfer();
         // let input = document.getElementById(input_element_id);
 
-        let input_element = document.querySelector('input[type="file"].svelte_input_file_element');
+        let input_element = document.querySelector('input[type="file"].svelte_input_file_element') as HTMLInputElement;
 
         if (!input_element) {
             console.error('Could not find the input element.');