Fix platform settings race condition and make auto-launch tri-state (#30977)

* Fix race condition with platform settings not being read correctly

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Allow Desktop app to be auto-started minimised or focused

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* i18n

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Use onChange prop

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Iterate

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Add tests

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

* Update res/css/views/elements/_SettingsDropdown.pcss

Co-authored-by: Florian Duros <florianduros@element.io>

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Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>
Co-authored-by: Florian Duros <florianduros@element.io>

src/BasePlatform.ts

@@ -70,6 +70,7 @@ export default abstract class BasePlatform {
     protected notificationCount = 0;
     protected errorDidOccur = false;
     protected _favicon?: Favicon;
+    public readonly initialised = Promise.resolve<void>(undefined);
 
     protected constructor() {
         dis.register(this.onAction.bind(this));