MDL-33486 wiki: allow searching individual wikis
MDL-43021 course: corrections to the shortname and idnumber uniqueness validation
MDL-44873 theme_bootstrapbase: Added support for notifytiny class
MDL-44873 behat: Added suppport for clean error class.
Merge branch 'wip-MDL-33486-m26' of git://github.com/marinaglancy/moodle into MOODLE_26_STABLE
Merge branch 'wip-MDL-43021-m26' of git://github.com/marinaglancy/moodle into MOODLE_26_STABLE
Merge branch 'wip-mdl-44873-m26' of git://github.com/rajeshtaneja/moodle into MOODLE_26_STABLE