changes map widget's default initial zoom

[CBiasuzzi]

Please check if the PR fulfills these requirements

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

Does this PR already have an issue describing the problem?

What kind of change does this PR introduce?

feature

What is the current behavior?

When there is no geo data, the map widget's map is centered and zoomed to an odd position.

What is the new behavior (if this is a feature change)?

Changes the widget's initial zoom default setting so that, when there is no geo data, the entire world map is displayed.

Does this PR introduce a breaking change or deprecate an API?

• Yes
• No

If yes, please check if the following requirements are fulfilled

• The Breaking Change or Deprecated label has been added
• The migration steps are described in the following section

What changes might users need to make in their application due to this PR? (migration steps)

Other information: