minor ui fixes: #1220, #1036, #1221
Merge pull request #381 from kobotoolbox/ui-fixes

Minor ui fixes: issues #1220, #1036, #1221
very minor styling to deployment button, #1210
spacing fix for #1210
Merge pull request #382 from kobotoolbox/deployment-button-1210

Very minor styling to deployment button, #1210
#1208 - validate registration username
Merge pull request #384 from kobotoolbox/registration-username-validation

#1208 - validate registration username
#1208 - registration form username validation
Merge pull request #385 from kobotoolbox/registration-username-validation

#1208 - registration form username validation
#1105 - ValidatingTextBox fixes
#1122 - Skip logic condition is not deleted if referenced question is deleted