fix(navdrawer): increase side padding of the text when no there is no icon

Author: MPopov

projects/igniteui-angular/src/lib/core/styles/components/navdrawer/_navdrawer-theme.scss

@@ -328,7 +328,7 @@
 
         span {
             @if $variant == 'indigo-design' {
-                padding-#{$left}: rem(4px);
+                padding-#{$left}: rem(8px);
             }
         }