UI improvements

check for null state before adding results to output

hide export buttons in studio

show message in studio rather than download buttons

dont disable export button when csv is available

correct conditions to see studio message

Survery response lable

Tag HTML strings for translation

# Conflicts:
#	setup.py

Mark Poll and Survey XBlocks as Mobile friendly

Polls UI fixes for mobile

hide element outline after poll is submitted; fixes js bug where focus may be given to another poll block on the same page

Add student_view_data to poll and survey xblock

adds student_view_user_state handler

adds tests for student_view data and user state

fixes pylint issues

adds student_view_data and user state documentation

bumps version to 1.3.0

Disable submit button on button click to avoid multiple ajax calls

 - Also, add test for the functionality
 - Bump version to 1.2.7

Summary: If submit button is clicked multiple times, multiple
ajax requests are sent. To avoid this, we disable the submit
button as soon as the submit button is clicked and enable it
again at the end of the ajax call depending on the response
from backend. This commit addresses EDUCATOR-273 issued in
openedx JIRA.

survey a11y improvements

avoid numeral-prefixed id attributes; bump to v1.2.5

[template] avoid potential invalid id attribute

[template] forgot to update default label

v1.2.5

dodge a few more numeral-prefixed ids

Added compiled translations

more descriptive labels for survey answers

fix survey a11y test

add col scope to answer heading

add headers to survey td elements

change aria-labelledby to aria-label for radio buttons

fix survey a11y test

Added compiled translations

[template] avoid potential invalid id attribute

[template] avoid potential invalid id attribute

[template] forgot to update default label

v1.2.5

dodge a few more numeral-prefixed ids

ziafazal/WL-580: added translation files and transifex config

Associate poll options with corresponding question

Mcka copy changes

A11y fixes

This commit addresses a11y issues listed in SOL-2059.