no-jira: set version 18.0.4

 Conflicts:
	.gitignore
	src/main/java/org/olat/core/commons/fullWebApp/_content/main_3cols.html
	src/main/java/org/olat/course/editor/_i18n/LocalStrings_en.properties
	src/main/webapp/static/themes/light/content.css
	src/main/webapp/static/themes/light/content.css.map
	src/main/webapp/static/themes/light/theme.css
	src/main/webapp/static/themes/light/theme.css.map
	src/main/webapp/static/themes/openolat/content.css
	src/main/webapp/static/themes/openolat/content.css.map
	src/main/webapp/static/themes/openolat/theme.css
	src/main/webapp/static/themes/openolat/theme.css.map