Adjusted dialog button styling.

Change-Id: Ic91a7d96eecad791673c8adabc070a4d5477bfd2
diff --git a/web/gui/src/main/webapp/app/fw/layer/dialog.css b/web/gui/src/main/webapp/app/fw/layer/dialog.css
index 1e7b9af..b132417 100644
--- a/web/gui/src/main/webapp/app/fw/layer/dialog.css
+++ b/web/gui/src/main/webapp/app/fw/layer/dialog.css
@@ -34,10 +34,11 @@
 }
 
 .dialog .dialog-button {
+    border-radius: 3px;
     display: inline-block;
     cursor: pointer;
     height: 20px;
-    padding: 2px 6px;
+    padding: 6px 8px 2px 8px;
     margin: 4px;
     float: right;
     /* color works for both light and dark themes */