a fix for coordinate editor layout on safari (#234)

[FlorianBruckner]

Backport of safari coordinate editor fix, see #6389
(cherry picked from commit adee867)

Description

Please check if the PR fulfills these requirements

• The commit message follows our guidelines: https://github.com/geosolutions-it/MapStore2/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (check one with "x", remove the others)

• Bugfix

Issue

see #6389

Breaking change

Does this PR introduce a breaking change? (check one with "x", remove the other)

• Yes, and I documented them in migration notes
• No

Other useful information

[coveralls]

Coverage increased (+0.01%) to 81.052% when pulling 6b76e53 on FlorianBruckner:feature/safari-coordinate-editor-backport into 04966bf on geosolutions-it:2021.01.xx.