Before this commit, the tooltip content of a tour had a font-size set in
rem. As its container dimensions were computed using the root element
font-size, these dimensions were not correct if the tip was inserted in
a document with another root element font-size.
This was leading to a bug after [1] added an iframe to edit the website:
the backend and frontend root elements font-size are different and the
containers of tips targeting frontend elements were clipped.
This commit fixes the tooltip content font-size in px (with the
font-size used to compute the container dimensions), so that it can be
placed in iframes with a different root element font-size.
[1]: https://github.com/odoo/odoo/commit/31cc10b91dc7762e23b4bde9b945be0c4ce3fe3b
task-3035156
closesodoo/odoo#106746
X-original-commit: 8703c01d0c0c84331e4d4adb00c8def962635e17
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>