timeout step changes timeout for browser but not SikuliX

[kensoh]

In current implementation when timeout step is used, the timeout before error is shown to wait for an UI element, only changes for the web browser and not visual automation.

Users have to use vision step to invoke separately setAutoWaitTimeout(wait_timeout) in SikuliX. TagUI should ideally set browser timeout and SikuliX timeout when timeout step is called.

[kensoh]

If tagui.sikuli/tagui_sikuli.in exists during execution, then it means SikuliX visual automation is involved. A change can be made in tagui_parse.php timeout_intent() and tagui_header.js timeout_intent() to invoke sikuli_step('vision setAutoWaitTimeout(wait_timeout)').

[kensoh]

Committed to master. Prior to packaged release, feature available from cutting edge version here -

https://github.com/kelaberetiv/TagUI#set-up

[kensoh]

SikuliX wait_timeout also needs to be changed as part of sikuli_step() when timeout step is used. Otherwise, when present() or visible() is invoked, the SikuliX timeout setting gets reverted back to its internal variable.

Also, 'casper' object should be used in displaying the error message instead of 'this'. Otherwise, for the execution context, this would be undefined and error message does not show up. Above committed PR fixes these issues.

Prior to packaged release, feature available from cutting edge version here -

https://github.com/kelaberetiv/TagUI#set-up