Poll answers are added dynamically on keypress

Removed add option button

poll option can be added dynamically & last option removed if empty upon submission

Poll answer can be added dynamically by losing focus

poll option can be added dynamically & last option removed if empty upon submission

refractored to avoid repetition of publisher:sync event

poll option can be added dynamically & last option removed if empty upon submission

Added a missing semicolon
Ignoring validation for last poll answer input

last input field is only deleted if there are more than three input fields and the last one is empty

poll is validated only if the last input is empty, and the first three have been filled

Removed duplicate remove last answer.

Dont need to check that the last value is populated as we are ignoring last value