Update infos for implemented WebGadget functions for MacOS

[Shardik]

In the help for the WebGadget for many functions is stated that they are only implemented for Windows although some of them are obviously implemented also for MacOS like
- SetGadgetItemText(#WebGadget, #PB_Web_HtmlCode, HTML$)
- GetGadgetItemText(#WebGadget, #PB_Web_HtmlCode)
- GetGadgetItemText(#WebGadget, #PB_Web_PageTitle)
- GetGadgetItemText(#WebGadget, #PB_Web_SelectedText)

Please update the help and change for all already implemented MacOS functions the remark "Windows only" to "Windows, MacOS".

[Andre]

Is this still an issue with the latest PB6.10 updates / docs?