19.0.0-rc.1

What's Changed

• fix(ssr): resize observe and animation player errors by @mddragnev in #15095
• fix(list): discrepancies with UI Kit by @SisIvanova in #15089
• fix(combo): move ngIf to search wrapper, not on input group by @didimmova in #15086
• refactor(themes): update theme preset mixins by @simeonoff in #15101
• refactor(themes): resolve Sass deprecation warnings by @simeonoff in #15099
• refactor(themes): update presets to only use the theme mixin by @simeonoff in #15100
• fix(igxPivot): Fix width calculations when inside flex container with… by @MayaKirova in #15057

Full Changelog: 19.0.0-rc.0...19.0.0-rc.1