During export as map add warning pop up

Please add warning dialog in case of export as map:
You are about to export only the visible section of this diagram. It may result in incomplete model. Zoom out to export bigger diagram.

mentioned in issue #1444 (closed)

After discussion with @piotr.gawron the suggestion is to improve the context menu, three possible options are:

layout a)
Select mode
Export current view (as label, inactive)
      as image
      as map

layout b)
Export current view (as label, inactive)
      as image
      as map
Select mode

layout c)
Export current view<line break>as image
Export current view<line break>as map
Select mode

What do you think @ewa.smula ?

changed milestone to %v15.2.0

hi @marek.ostaszewski, I would go for layout c), please see images below:

1.

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2.

@marek.ostaszewski
I tried these two also, but I think above layout c) is the best.

1.
this one I like, but it is not consistent with first row - MolArt (the uniprot is displayed on the right)

---

2. layout a)

@ewa.smula thanks! The last one (2.a) looks the best for me.

changed milestone to %v16.0.0~alpha.1

added graphics; css; layout label

created merge request !1279 (merged) to address this issue

mentioned in merge request !1279 (merged)

closed with merge request !1279 (merged)

mentioned in commit 96db0b08