[UI] Windows don't know about themselves

[schwindp]

Windows don't know about themselves, therefor you can open multiple instances. For example if you click on "Zu Alarmieren", it always opens a new one, doesn't honor existing ones.

[robo-w]

@at-dro: I think you know the window manager the best. Is there a possibility, to bring the current incident detail window to front, if it is requested a second time?

[at-dro]

It has been a while since I worked with this code, but should be possible like this:

• Add a hash identifying the window (something like "windowType-entityId") to the data object passed to addWindow
• Store a map of the hash and the corresponding id (created at winman.js:142) whenever a new window is created
• Check if the window for a hash already exists at the beginning of addWindow, and if yes open/focus the window (logic can probably be taken from toggle(id))
• Make sure the hash is removed from the map in the _close(id) callback.

[at-dro]

And while we are at it: The _close(id) callback seems to only remove the window and taskbar button from the DOM, but not the objects this.windows and this.buttons, which seems wrong.