Input group implementation

[joserick]

• Added bootstrap input group structure
• Possibility to modify attributes in label tag
• Placeholder effect in select tag
• Support nested arrays as option groups in select tag
• Remove label tag if it is null
• Possibility of adding attributes to form-open
• Added brackets to value of the "name" attribute for select tag with "multiple" attribute

More information about the methods of input group here

[jnbn]

@joserick Can you please document these changes on readme so they'll be available for everyone after MR is accepted?

[joserick]

Of course, but since you mention about the documentation, I was thinking of enabling the wiki since having all the documentation in a only list in readme is very tedious to find a function.

The wiki of my "Fork" already has all the structured information but I don't know how to do a wiki "push", of course if this allow me.

[jnbn]

Oh thank you then. 👍

[dansleboby]

Check this out, a proposition for values of filled element with "with"

dansleboby@feafd82