Purpose:
=======

- Change the indentation of the articles names in the sidebar, so
that articles of the same level (parent/1st child/2nd child, ...)
are aligned

- Make the size of the input match exactly the length of the article
name: previously, the input size was set using the size attribute,
which approximates the length using the number of characters of the
name and a mean character width value. This resulted in cropped names
if there was a majority of large characters, or in a too large input
if it was the opposite. The name was also cropped when entering the
edition mode.
The input size now matches exactly the article name, at any time

- Change the range of the allowed width for the resizable sidebar:
allows users to make it smaller than before, but not as wide
(users could resize it to take the half of the screen width, which
was too much considered it is a sidebar)

- Change wording of messages shown when trying to move an article:
adds the article name in the message, and the destination in the
title to make it easier for the user

- Make icons bigger in the options panel

- Avoid changing the look of the sidebar when installing website:
fixes the font-size in the sidebar so that the search bar, section
headers and article names are not too large when installing website.

- Fix broken logos in the permission panel: mimicks the behavior
of the many2one_avatar widget by zooming in the image to fill the
container, instead of stretching the image.

- Fix hidden article names in the sidebar: shows the article names in
the sidebar even when the window size is small.


- Add resizable sidebar in frontend: allows visitors to resize the
sidebar, the same way users can do it in backend, as visitors can also
have small screens

- Keep selected sidebar size: when an user changes the size of the
sidebar, the selected width is stored in localStorage so that it can be
set automatically when the user selects another article or reloads the
page

Task-2858661