Problem with Onchange solved

[ghost]

I open this issue as a reminder, that sometimes a problem with onchange files can appear when selenium clear the element text before write the new text on the field. This can sometimes call the function onchange with an empty value.

This can be solve editing the selenium2library, if we are using it, or the ExtendedSelenium2Library, if this is the one we are using.

I copy an example of the change for selenium2library to void this annoying behaviour:
https://github.com/brain-tec/Selenium2Library/blob/0cc8aa456825de8fbac70763edd25c51050a9771/src/Selenium2Library/keywords/_formelement.py#L364

brain-tec/selenium2library@0cc8aa4