webOS: Ability to set disableBackHistoryAPI

[pchmelar]

Describe the solution you'd like

• Currently, it is not possible to set disableBackHistoryAPI in appinfo.json for the webOS build (or I didn't find how).
• This flag is important for handling the back button in SPA that doesn't use history API.

Describe alternatives you've considered

• I tried to put the whole appinfo.json in [root]/appConfigs/base/builds/webos/public/ as suggested in https://github.com/renative-org/renative/issues/491, but that doesn't work for me.. the default appinfo.json is picked everytime.
• I ended up with running the build, overriding appinfo.json in /platformBuilds/helloworld_webos/project and then manually export the .ipk with ares which is not convenient.

Additional context https://webostv.developer.lge.com/develop/app-developer-guide/back-button/ https://webostv.developer.lge.com/develop/code-samples/remote-control/