Improve Geocarousel section

[dsuren1]

Description

Improvements:

• Improve the user experience in edit mode. The height of the column is increased every time the user adds a new content and that's fine but, if the column has a lot of contents in it, the carousel (the list of items) disappear from the screen: we should keep it always visible to provide a better UX in editing the GeoCarousel section. In view mode it is fine to maintain a fixed height with a scrolbar (as it is now)

What requested could be implemented using a sticky position of the carousel div, eg:

.ms2 .ms-cascade-story .ms-section .ms-section-carousel {
    margin: 0 auto;
    overflow-x: clip;
    padding: 0;
    **position: sticky;**
    **bottom: 0px;**
    **z-index: 5;**
}

• if the title is missing the popup should not be visible

• improve the draw marker UX with some message to explain that a user need to click on the map

• Improve UX with tooltip message to inform upon adding new geocarousel section

Refer: #7095 (review)

What kind of improvement you want to add? (check one with "x", remove the others)

• Minor changes to existing features
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)

Other useful information

[dsuren1]

Hi @ElenaGallo The above improvements will be a handled as part of this issue reported in #7095 (review). Kindly consider this as you test #6993

[dsuren1]

Tracking testing issues reported as part of #6993 in this issue
#6993 (comment)
#6993 (comment) (Not a bug)