Add Bootstrap Input element

[tryexceptpass]

Create Input object representing the <input> tag with form-control class.

• Include readonly attribute
• Support helptext through help-block span linked using aria-describedby
• Provide sizing through input-lg or -sm
• Manage the type property to cover text, password, datetime, datetime-local, date, month, time, week, number, email, url, search, tel and color.