Add Placeholder switch - Bootstrap Form Generator

[Quy]

Please add switch to toggle placeholder attribute.

Manually removing them is tedious only to reappear after rerunning the generator.

A related request:

Don't output aria-describedby attributes when Help Texts is disabled

OS info Operating System : Windows 10.0.19042 Wappler Version : 3.7.4 Problem description When Help Texts is disabled, these attributes serve no purpose. Thus they should not be outputted in markup. dmx-bind:aria-describedby="" aria-describedby="" Steps to reproduce Click Generators > Bootstrap 4 Form General. Complete settings, and leave Help Texts disabled. Click OK. See generated markup.