Improve draggable windows layout management

[MV88]

Description

We need some sort of window manager for handling the layout when modals are visible on the map. Actually the order of the modals depends on the order they are added in the localcConfig

the window manager should:

• [ ] show the last opened modal in front of all other windows and side panels
• [ ] needs #3025
• [ ] (optional) when a modal is "activated" (by click for example) then move it in front of others.
• [ ] (optional) add "bring forward" - "bring backward" functionalities.
• [ ] (optional) settings and shapefile that are using different windows then the other tools, we should align them

  In case of Bug (otherwise remove this paragraph)

Browser Affected (use this site: https://www.whatsmybrowser.org/ for non expert users)

• [ ] Internet Explorer
• [ ] Chrome
• [ ] Firefox
• [ ] Safari

Browser Version Affected

• Indicate the browser version in which the issue has been found

Steps to reproduce

• open print
• open measure (or any other tools which displays a modal)

Expected Result

• last modal opened is in front of all others

Current Result

• Describe here the current behavior

Other useful information (optional):

The problem is that right now, if they have the same z-index and the last in the DOM inside <div id="viewer"> appears as the first With this pr zIndex are customized for the different dialogs

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[MV88]

proposed solutions:

• implementing a window manager

• avoid draggable windows ( migrate to modals or something else)

• About feature grid conflict, the right panels should be closed as well as the feature info does, when featureinfo is opened. Also the opposite should be true. TODO: verify all the use cases

Ideas to convert existing windows: Add local vector file: has been refactored as an import/export tool. We should make the remaining windows (styler) as modal windows Settings: modal (or side panel, you don't need to interact with the map) Print: TBD (interact with map or not) ? Share: Side panel (you have to interact with the map to setup the zoom) Measure: already optional side-panel About: Modal