EditProfile: fix formdata submission

app/soapbox/actions/me.js

@@ -59,18 +59,12 @@ const persistAuthAccount = (account, params) => {
   }
 };
 
-export function patchMe(params, formData = false) {
+export function patchMe(params) {
   return (dispatch, getState) => {
     dispatch(patchMeRequest());
 
-    const options = formData ? {
-      headers: {
-        'Content-Type': 'multipart/form-data',
-      },
-    } : {};
-
     return api(getState)
-      .patch('/api/v1/accounts/update_credentials', params, options)
+      .patch('/api/v1/accounts/update_credentials', params)
       .then(response => {
         persistAuthAccount(response.data, params);
         dispatch(patchMeSuccess(response.data));

app/soapbox/features/edit_profile/index.tsx

@@ -27,6 +27,25 @@ const hidesNetwork = (account: Account): boolean => {
   return Boolean(hide_followers && hide_follows && hide_followers_count && hide_follows_count);
 };
 
+/** Converts JSON objects to FormData. */
+// https://stackoverflow.com/a/60286175/8811886
+// @ts-ignore
+const toFormData = (f => f(f))(h => f => f(x => h(h)(f)(x)))(f => fd => pk => d => {
+  if (d instanceof Object) {
+    // eslint-disable-next-line consistent-return
+    Object.keys(d).forEach(k => {
+      const v = d[k];
+      if (pk) k = `${pk}[${k}]`;
+      if (v instanceof Object && !(v instanceof Date) && !(v instanceof File)) {
+        return f(fd)(k)(v);
+      } else {
+        fd.append(k, v);
+      }
+    });
+  }
+  return fd;
+})(new FormData())();
+
 const messages = defineMessages({
   heading: { id: 'column.edit_profile', defaultMessage: 'Edit profile' },
   header: { id: 'edit_profile.header', defaultMessage: 'Edit Profile' },
@@ -193,8 +212,9 @@ const EditProfile: React.FC = () => {
 
   const handleSubmit: React.FormEventHandler = (event) => {
     const promises = [];
+    const formData = toFormData(data);
 
-    promises.push(dispatch(patchMe(data, true)));
+    promises.push(dispatch(patchMe(formData)));
 
     if (features.muteStrangers) {
       promises.push(