CClient::setInstallationStatusBar

Description: Sets new percent value and/or new status text on the client's installation status bar.
Parameter:

• percent: Percent value to write into the DB (may be false, if it should not be changed).
• statustext: A text message that should be shown under the status bar and written to the DB (may be false, if it should not be changed).

Returns:

• : false on parameter error.