Stability pack

Number of smaller improvements and bug fixes were released this week:

• Fixed editing tags with empty description,
• Loading time of question page decreased by 0.5s on average,
• Added max length validation for question title (maximum 230 characters),
• Improved opening links included in question/answer/comment content,
• Added support for Microsoft Edge browser. Supported browsers: Chrome, Firefox, Safari and Edge. Internet Explorer is still not supported