fix(combo): use min-width for search input start and end/update icon size (#15108)

Author: didimmova

projects/igniteui-angular/src/lib/core/styles/components/combo/_combo-theme.scss

@@ -148,12 +148,12 @@
         }
 
         .igx-input-group__bundle-main {
-            padding-inline-start: 0;
+            padding-inline: 0;
         }
 
         .igx-input-group__bundle-start,
         .igx-input-group__bundle-end {
-            display: none;
+            min-width: 0;
         }
 
         igx-input-group {
@@ -164,10 +164,10 @@
 
     %igx-combo__case-icon,
     %igx-combo__case-icon--active {
-        .igx-icon {
-            width: rem(16px);
-            height: rem(16px);
-            font-size: rem(16px);
+        line-height: 0;
+
+        igx-icon {
+            --size: rem(18px);
         }
     }
 

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

@@ -422,12 +422,15 @@
         }
 
         input,
-        textarea,
-        span {
+        textarea {
             font: inherit;
             margin: 0;
         }
 
+        span {
+            font-family: inherit;
+        }
+
         input[type='file'] {
             @include hide-default();
         }