popup_autoclosable: Don't hide popup on window resize or scroll

closes #526
Merge pull request #527 from bem/fix/526@v2

popup_autoclosable: Don't hide popup on window resize or scroll
input: `_type_search` examples for default and simple themes
input: Check `_has-label` before add `__label` to content (close #534)
Merge pull request #535 from bem/issues/534@v2

input: Check `_has-label` before add `__label` to content
jscs: do not check enb cache
button: Add ability to set max width for text (close #528)
Merge pull request #530 from bem/issues/528@v2

button: Add ability to set max width for text
checkbox-group: make css (close #508)
Merge pull request #539 from bem/issues/508@v2

checkbox(-group), radio(-group): css, refactoring
checkbox: add CSS for _focused mod
button__text: custom match fixed
Merge pull request #543 from bem/issues/541@v2

checkbox: add CSS for _focused mod
checkbox: remove unused svg
Merge pull request #546 from bem/issues/545@v2

checkbox: remove unused svg
radio-group: Fix diff between BEMHTML and BH templates
Merge pull request #551 from bem/issues/550@v2

radio-group: Fix diff between BEMHTML and BH templates
radio-group: Move unnecessary CSS to block radio
Merge pull request #553 from bem/issues/552@v2

radio-group: Move CSS to correct place (block `radio`)
icon: move styles from `design` to base level