Fix OnChange Event Invocation

[robonetphy]

resolve #1997

[robonetphy]

@gohabereg I checked tests with next branch is failing.

[drakst]

Hi. Instead of onChange event you can try to connect MutationObserver to editor ad watch for updates.

Config of observe can be something like: {
attributes: false,
childList: true,
subtree: true,
characterData: true
}

Im using this config on vue project for change v-model value