Commit [1] keeps the snippet cache alive through different
instance of the website snippet menu.
This allows for the user to switch pages, even apps, while
keeping the snippets in cache, decreasing the startup time of the
snippet menu.
However, the cache is not invalidated when switching website or
installing a new theme.
This commit adds a `invalidateSnippetCache` property to the
websiteService. If this property is set to `true`, the cache will be
invalidated next time the menus loads its snippet.
This property is currently set to `true` when changing website and
switching theme.
[1]: https://github.com/odoo/odoo/commit/03c552690b15cbf2e7d6b7812386ac64042219af
task-2687506
X-original-commit: bb503962a36f3798c50049f2844e7b288b632955
Part-of: odoo/odoo#102799
Arthur Detroux (ard)
d7b2b7882f