Issue #448: Disable worker when the Simulator is hidden in history and ensure that we load only one Simulator page.
(cherry picked from commit 0da63c266bea34d6d59cf90da6494c49b26eacb7)
Use San Francisco office position by default instead of 0,0 (in middle of Atlantic ocean!)
(cherry picked from commit f019a54a8483f76450cb763c7d9a8e7a13014247)
Issue #343: remove unnecessary prosthesis/skin/ directory
(cherry picked from commit c4e641a81061ed0c8f3dab1888ef2c2e15845340)
Issue #196: Prevent horizontal resize and prevent smaller vertical one.
(cherry picked from commit bc21ed006680d55759a8bb23c2821f83993c3ef1)