removes SEO fields, meta_description maxlength=155, page_title default on top, menu_title default=True
docs
docs
missing migration
fixed tests
cleanup test
Merge branch 'develop' into no-seo

Conflicts:
	docs/upgrade/3.0.rst
docs
Merge branch 'develop' into no-seo

Conflicts:
	CHANGELOG.txt
Merge pull request #1751 from digi604/no-seo

SEO fields refactor
Merge branch 'develop' into frontend_languages

Conflicts:
	CHANGELOG.txt
	docs/upgrade/3.0.rst