Can select current panelInEdit as dashboard panel datasource

[Sergej-Vlasov]

When selecting Dashboard data source there is an option to select currently open dashboard. Seems to be due to dashboard.panelInEdit because it is undefined in scenes and defined in old arch and this check does not filter out currently open panel

Screen.Recording.2024-04-30.at.17.14.42.mov

[grafanabot]

@Sergej-Vlasov please add one or more appropriate labels. Here are some tips:

• if you are making an issue, TODO, or reminder for yourself or your team, please add one label that best describes the product or feature area. Please also add the issue to your project board. 🚀

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