Fixes styling in bootstrap environment

Fixes #1588 thanks to @smajl
Use more specific selector for finding options of a select
modified version identifiers in descriptors for release 3.4.3
Merge pull request #1723 from AlexanderZaytsev/master

Use more specific selector for finding options of a select
Merge pull request #1717 from ProLoser/patch-1

Fixes styling in bootstrap environment
Merge pull request #1722 from yonjah/master

dropdown repostion fix when previous postion changes container position
Update select2-bootstrap.css

Added Bootstrap Validation states for warning, error, info, and success
Merge pull request #1729 from rschmitty/master

Update select2-bootstrap.css
Update select2_locale_fi.js

fixed typo in Finnish translation
Merge pull request #1764 from tjnurmin/patch-1

Update select2_locale_fi.js
corrections for the greek (el) locale file
Merge pull request #1768 from kabitakis/master

corrections for the greek (el) locale file