Intended to cleanup qweb xmls:
- remove blank (empty) nodes and/or nodes with whitespace text
- fix indentation
- remove indentation (needed for some xml signatures)
closesodoo/odoo#91006
X-original-commit: b7d7adb4f5a9873350511c227d5fbf54c8f38ce8
Signed-off-by: William André (wan) <wan@odoo.com>