SOC-3462 [XSS] My Activity Stream - share link

Fix description: Escape single quote sign, double quote sign and html tag for title, description and link
before loading js in UILinkActivityComposer template.
And unescape it when rendering on UI.
SOC-3149 CLONE - Possible XSS attack by adding new activity stream

Fix description: escape html in link's description, link's title on preview mode and UILinkComposer class.
SOC-3298 [Space Members] Alphabet bar disappears when there is no result

Problem analysis:
* Alphabet bar only appear when there is at least one result

Fix description:
* Render the alphabet bar independent from result number
* Remove the second message when there is no result to avoid message duplication
* Remove the redundant variable invoking UIMembersPortlet.label.admin
SOC-3599 | Build test failed at ActivityStorageImplTestCase.testActivityOrderByPostedTime
SOC-3599: Add unit test for ActivityOrderByPostedTime on the 1st of month
SOC-3916: [Profile] Wrong validators of Organization and Position

Fix description:
	- Use consistance validator in social with these in exogtn
SOC-3916: Restore current position field as mandatory
SOC-3917 | Encoding problem of Position update in Activity Stream. Unescape html characters for "position" field.
SOC-3947 | [Connections] Wrong buttons in user pop-up.
SOC-3973: Impossible to save user experience in German due to date format error

Fix description
	- Manually check time format
SOC-3973: Refactor code
SOC-4044 | [Security] XSS vulnerability when mouse over user popup.
SOC-4095 - Add proirity to OSHtmlSanitizer in order to remove warning message during startup
SOC-4144 [Activity Composer]Not show inputLink textbox at the first click on 'AddLink' icon

Fix description: at the first time user uses link composer, only add trigger for click action if we are on normal mode, not on preview mode.
UI-3228  [Social] Alignment bugs on Profile and Connection
SOC-3813 | Broken layout on Space invitation page
Merge feature/stabilization to master
Merge master to feature/stabilization
SOC-4162: [Experience] Wrong date validation when still at a position.

Problem analysis
	- When ending date gets the value "Still in this position", its value is null.

Fix description
	- Verify end date is not null and not empty before parsing date value
	- Do not check any validation else when there is a wrong date time format
Crowdin injection w9 (from 20140222 to 20140223)