refactor(dialog): update material theme paddings

Author: desig9stein

projects/igniteui-angular/src/lib/core/styles/components/dialog/_dialog-theme.scss

@@ -96,21 +96,21 @@
     ), $variant);
 
     $dialog-title-padding: map.get((
-        'material': rem(24px) rem(24px) rem(12px) rem(24px),
+        'material': rem(16px) rem(24px) rem(0px) rem(24px),
         'fluent': rem(16px) rem(24px) rem(24px) rem(24px),
         'bootstrap': rem(16px),
         'indigo': rem(24px) rem(24px) 0 rem(24px),
     ), $variant);
 
     $dialog-message-padding: map.get((
-        'material': rem(12px) rem(24px),
+        'material': rem(14px) rem(24px),
         'fluent': 0 rem(24px) rem(20px) rem(24px),
         'bootstrap': rem(16px),
         'indigo': rem(16px) rem(24px),
     ), $variant);
 
     $dialog-actions-padding: map.get((
-        'material': rem(8px),
+        'material': 0 rem(8px) rem(8px),
         'fluent': 0 rem(24px) rem(24px) rem(24px),
         'bootstrap': rem(16px),
         'indigo': rem(16px) rem(24px) rem(24px) rem(24px),