Before this commit the dimensions of the tour tip text obtained from
the text content was forced onto the complete active tooltip, sometimes
hiding a part of the text because the complete tooltip had additional
borders that prevent the text from using the same space as during the
measurement.

After this commit the dimensions of the tour tip text is computed by
taking the measure on the full tip by temporarily switching it to the
text display during initialization.

task-2391201

closes odoo/odoo#62142

Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>

* The info mode was misplaced when running into iframe.

* Added static position to the tip when anchor position is fixed

Task Id 2216067
Closes #48529

* Improve the JS/LESS so that its content makes the tip grow
with a bubble effect (instead of using a popover).
* Avoid flickering when the mouse leave/enter the tip or move
between the tip and its anchor element.
* Use text-align:left instead of justify
* Set the content width in JS (to a larger width) to be customizable
* Round LESS variable to avoid values like 266.6666666666
* Set opening direction according to viewport:
  - Top and bottom tips open towards the right except if they overflow
    the window on this right
  - Left and right tips open towards the bottom except if they overflow
    the window on this bottom
* Improve the 'Skip these steps' mechanism (which is easier as we don't
  use bootstrap's popover anymore)

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