17.2.26

What's Changed

• fix(query-builder): delete empty groups - 17.2.x by @igdmdimitrov in #15035
• fix(datepicker): fix header title templating by @didimmova in #15046
• fix(date-range): projected input focus restore on consecutive close by @damyanpetev in #14956
• fix(avatar): src is not encoded as URI by @simeonoff in #15070
• fix(themes): add missing igx-icon-button deps by @simeonoff in #15078

Full Changelog: 17.2.25...17.2.26