🐛 Allow anything in the input for the form.

If it works, it works.
Fixes #256

src/components/AppShelf/AddAppShelfItem.tsx

@@ -123,13 +123,9 @@ export function AddAppShelfItemForm(props: { setOpened: (b: boolean) => void } &
     validate: {
       apiKey: () => null,
       // Validate icon with a regex
-      icon: (value: string) => {
-        // Regex to match everything that ends with and icon extension
-        if (!value.match(/\.(png|jpg|jpeg|gif|svg)$/)) {
-          return 'Please enter a valid icon URL';
-        }
-        return null;
-      },
+      icon: (value: string) =>
+        // Disable matching to allow any values
+        null,
       // Validate url with a regex http/https
       url: (value: string) => {
         try {