Prompt and Release Notes are not centered in cupertino style AlertDialog.

[tadinh98]

When using the cupertino style AlertDialog the "Would you like to update it now" and "Release Notes" texts are not centered unlike the title and message above it.

Screenshot:

Potential cause of problem: In the _alertDialog method prompt and notes are wrapped inside columns with "crossAxisAlignment: CrossAxisAlignment.start".

      notes = Padding(
          padding: const EdgeInsets.only(top: 15.0),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.start,
            children: <Widget>[
              Text(messages.message(UpgraderMessage.releaseNotes) ?? '',
                  style: const TextStyle(fontWeight: FontWeight.bold)),
              Text(releaseNotes),
            ],
          ));

final content = Container(
        constraints: const BoxConstraints(maxHeight: 400),
        child: SingleChildScrollView(
            child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          mainAxisSize: MainAxisSize.min,
          children: <Widget>[
            Text(message),
            Padding(
                padding: const EdgeInsets.only(top: 15.0),
                child: Text(messages.message(UpgraderMessage.prompt) ?? '')),
            if (notes != null) notes,
          ],
        )));

[larryaasen]

@tadinh98 Thanks for this bug report. I fixed the centering issue with the Cupertino style UpgradeAlert dialog and it will be in the next release.