Fix for issue #351. Have changed code so that it only changes value of extra_flags for projects where that value is empty. So it doesn't change where engine is already set to flash or javascript and only changes to javascript where value is currently empty. As this is now xerte 3 I think setting the empty values to javascript should be ok but we can change the value set to Flash if we think that should be the case. The main point is that running upgrade.php doesn't now change all projects to flash.
Fix for issue #351. Have changed code so that it only changes value of extra_flags for projects where that value is empty. So it doesn't change where engine is already set to flash or javascript and only changes to javascript where value is currently empty. As this is now xerte 3 I think setting the empty values to javascript should be ok but we can change the value set to Flash if we think that should be the case. The main point is that running upgrade.php doesn't now change all projects to flash.

torinfo/xerteonlinetoolkits,torinfo/xerteonlinetoolkits,thexerteproject/xerteonlinetoolkits,torinfo/xerteonlinetoolkits,torinfo/xerteonlinetoolkits,thexerteproject/xerteonlinetoolkits,thexerteproject/xerteonlinetoolkits,thexerteproject/xerteonlinetoolkits,thexerteproject/xerteonlinetoolkits,torinfo/xerteonlinetoolkits