Merge branch 'tree-grid-tests' of https://github.com/IgniteUI/igniteui-angular into tree-grid-tests

Author: kdinev

projects/igniteui-angular/src/lib/core/styles/components/calendar/_calendar-theme.scss

@@ -640,6 +640,8 @@
     igx-years-view,
     igx-month-picker,
     igx-months-view {
+        color: var-get($theme, 'content-text-color');
+
         %cal-body-display {
             @if $bootstrap-theme {
                 padding-bottom: 0;