…de automatically

Thee adminId is now removed from the URL and upon adminId detection, the drawing
menu is automatically opened.

Re-worked the KML metadata for simplification, now it is set together with
the layer in the layer store action. This simplify the url to layer store
logic.
Also avoid to have duplicate layer object in the store, now the active/selected
kml layer for drawing is only kept in the layer store, previously it was cloned
and also kept in the drawing store. The drawing menu has a copy of the layer
when the drawing mode is open, but this copy is only used by the drawing module
and is not in a store !

To avoid having the kml default opacity hardcoded in several places in the code
the KML layer class constructor has been changed in order to have the opacity
optional. So now the default opacity is only hardcoded in one place in the
KMLLayer class.

…ing menu

The adminId is kept in memory until next reload. Also keep the layerId in the
url when inside the drawing mode in order not to loose if the page is reloaded.

We also uses the last KML in the active list (independently of visible flag) as
the kml to edit/copy. This is need because if the user is reloading the page
while editing the layer will be invisible after reloading, so the user still
have the possibility (without making the layer visible again) to copy edit
his drawing.

Let Vue router to handle URL encoding and parsing without a special hack
for the layers parameter. This caused troubled with the E2E tests.

Moreover we should be consistent in the encoding and not use any special case
for one parameter. This complicate the code and make it more error prone.

Waiting on the activelayers array size is not enough after closing the drawing
mode as the drawing layer is added in invisible mode before closing and its
visible flag is toggled on close.

When a KML admin ID was detected in the layer and the active layers was updated,
the drawing mode was automatically open. This was expected upon parsing the
KML admin ID from url, but this also happened when the active layers changed
like for example toggling any layer visibility or config or re-ordering layers.

Now we explicitely open the drawing mode on admin id parsed from url parsing.

Now while drawing the kml layer visible flag is kept to true, this allow the
user to reload the page while drawing without loosing the visible flag. This
commit also fixed the issue that a drawing copy would be added to the active
layer list instead of replacing the copied drawing.

Re-order the layers store actions and mutation to have logic order, this
make the code easier to read/navigate.

The auto open drawing mode based on KML admin ID from Url had a possible race
condition, which never occurred during testing, but to be safe this race
condition is handled here.