keybinding: support more complex when-conditions

[SailorMax]

• VSCode Version: 1.18.1
• OS Version: Windows 10

Can you add support more complex when-conditions. Sample:

// Place your key bindings in this file to overwrite the defaults
[
	{
        	"key": "ctrl+]",
	        "command": "editor.action.jumpToBracket",
	        "when": "editorTextFocus"
	},
	{
		"key": "ctrl+]",
		"command": "editor.emmet.action.matchTag",
		"when": "editorTextFocus && (editorLangId == html || editorLangId == xml)"
	}
]

same hotkey for different file types exec different commands

Currently VSCode support only simple "&&". Second hotkey doesn't work. And we have to write:

// Place your key bindings in this file to overwrite the defaults
[
	{
        	"key": "ctrl+]",
	        "command": "editor.action.jumpToBracket",
	        "when": "editorTextFocus"
	},
	{
		"key": "ctrl+]",
		"command": "editor.emmet.action.matchTag",
		"when": "editorTextFocus && editorLangId == html"
	},
	{
		"key": "ctrl+]",
		"command": "editor.emmet.action.matchTag",
		"when": "editorTextFocus && editorLangId == xml"
	}
]

[jVanZwieten]

As well, it would be nice to use != for example:

"when": "editorTextFocus && suggestWidgetVisible && editorLangID != json"

[NightMachinery]

Dup of #91473 ?

[usernamehw]

/duplicate of #91473