message: fix(gui): Fix image checks in image selections
  I must have screwed something up during a rebase,
  this mends the partition table an windows image checks.
  Change-Type: patch
diff: @@ -83,10 +83,10 @@ module.exports = function(
  Bluebird.try(() => {
  let message = null;
  - if (supportedFormats.looksLikeWindowsImage(image)) {
  + if (supportedFormats.looksLikeWindowsImage(image.path)) {
  analytics.logEvent('Possibly Windows image', image);
  message = messages.warning.looksLikeWindowsImage();
  - } else if (supportedFormats.missingPartitionTable(image)) {
  + } else if (!image.hasMBR) {
  analytics.logEvent('Missing partition table', image);
  message = messages.warning.missingPartitionTable();
  }
  