Remove advanced form functionality

[kaittodesk]

Plugin's advanced form functionality is very limited:

• no way to build multiple forms, i.e. one HTML applies to all forms;
• enabling advanced forms overrides simple forms;

I propose we remove advanced form functionality from the plugin and direct users towards our Contact Form 7 plugin - https://github.com/sendsmaily/smaily-cf7-plugin/. This may require a major release.

[kaittodesk]

As an alternative we could also suggest using HTML widgets. This way user does not have to install another extension.

[ghost]

We could add a settings page to create and manage new forms. Form could be specified from a <select> field in widget options, with the default value being basic form.
This would allow all users to keep already saved forms and would grant experienced users more flexibility.

[kaittodesk]

This is what I am actually trying to avoid, because it would make the upgrade path of the plugin more difficult.

We are planning on having form builder built into Smaily, and all of the custom form functionality would be provided by that feature, i.e. user would be able to select a form built in Smaily to show on their website. If we'd add form management functionality to the plugin (even if it is as basic as storing HTML in the database), then we would need to have a plan in place for what to do with the forms managed by the plugin when form builder is generally available, and can be integrated with the plugin. At the moment I cannot see a good way to get rid of the plugin managed forms.