Merge branch '15.1.x' into ibarakov/fix-12581-15.1.x

Author: igdmdimitrov

projects/igniteui-angular/src/lib/core/styles/components/grid/_grid-theme.scss

@@ -2163,9 +2163,10 @@
     }
 
     %igx-group-label__count-badge {
-        > div {
-            background: var-get($theme, 'group-count-background');
-            color: var-get($theme, 'group-count-text-color');
+        --background-color: #{var-get($theme, 'group-count-background')};
+        --text-color: #{var-get($theme, 'group-count-text-color')};
+
+        > span {
             font-size: $grid-head-fs;
         }
     }

projects/igniteui-angular/src/lib/core/styles/components/input/_input-group-theme.scss

@@ -534,7 +534,7 @@
         height: var(--size);
         position: relative;
         max-width: 100%;
-        font-size: 1rem;
+        font-size: rem(16px);
 
         &::after {
             content: '';
@@ -1896,7 +1896,6 @@
 
     %form-group-input {
         @include type-style($input-text) {
-            font-size: 16px;
             margin: 0;
         }
     }