Please consider adding "has_selection" key to Editor context

[iamvoidcoder]

Hi. I keep missing badly a rather basic functionality: an ability to configure some editor conditional key bindings depending on whether the text selection is present or not. This is trivial in VSCode, Sublime and other editors as there is an out of the box context / condition selection presence flag:

E.g. VSCode equivalent:

// Match when selection present
{
    "key": "ctrl+x",
    "command": "editor.action.clipboardCutAction",
    "when": "editorTextFocus && editorHasSelection",
}

// Match when no selection present
{
    "key": "ctrl+x",
    "command": "cancelSelection",
    "when": "editorTextFocus && !editorHasSelection",
}

This sounds like a super trivial mod. Could be just an extra "has_selection" key in the existing "Editor" context so the bindings can be matched against:

"context": "Editor && has_selection"

Please 🙏🙏🙏

[olejorgenb]

#4676