message: Update headers are empty check on INJECT_HEADERS
  * Update headers are empty check on INJECT_HEADERS
  An empty headers dict currently is not treated as having 'no headers to inject'
  Discussed in:
  * Accidentally changed line
diff: @@ -447,7 +447,7 @@ const reducer = handleActions(
  // it makes sure, that there definitely is a tab open with the correct header
  INJECT_HEADERS: (state, { payload: { headers, endpoint } }) => {
  // if there are no headers to inject, there's nothing to do
  - if (!headers || headers === '') {
  + if (!headers || headers === '' || Object.keys(headers).length === 0) {
  return state
  }
  const headersString =
  