Merge pull request #490 from rmansoor/master

PPP-3129 - Extending WebContext filter to include license validation
Adding check for SystemSetting in runAsSystem before usage. This fixes some unit tests and potential issues.
Fixes based on failing unit tests.
BISERVER-9050 - Made the close icon on closeable tabs themeable.
Merge pull request #491 from rfellows/dev

BISERVER-9050 - Made the close icon on closeable tabs themeable.
PPP-3129 - Extending WebContext filter to include license validation