Support a windowed option for geocoder

[fschmenger]

I propose to introduce support for running the UI of geocoder in a floating and sidebar window. This is a follow up task to standardising the behavior of toolbar-buttons and modules, which was started with #206 and #207.

For a proof of concept implementation I introduced a new module card attribute "winHeader": false to disable the window toolbar - name of the attribute is subject to discussion. Here's an example for the module definitions and a corresponding screenshot:

 "modules": {
    "wgu-geocoder": {
     "target": "toolbar",
      "win": "floating",
      "winHeader": false,
      "icon": "search",
      "initPos": {
        "left": 8,
        "top": 74
      },
      ......
   }
}

 "modules": {
    "wgu-geocoder": {
      "target": "toolbar",
      "win": "sidebar",
      "winHeader": false,
      "icon": "search",
      ......
   }
}

[fschmenger]

@chrismayer
My question regarding this: Do we want to support placement of the geocoder searchbar on the Wegue toolbar in the future?

In my opinion this is not a great solution, because

• it scales bad on devices with small screen width
• all toolbar-buttons currently support the target": "menu" option. If this is set for the geocoder, it breaks the layout of the hamburger menu.

Even though I got a prototype to work, a generical switch between placing content on the toolbar and on a card is pretty cumbersome to implement.