SVY-21251 Bootstrap datalabel onAction does not trigger if entered [ai]

- Added .bts-label:focus, .bts-datalabel:focus rule with @main-color-light outline color in theme

Author: cPecican

servoy_ngclient/src/com/servoy/j2db/server/ngclient/less/resources/servoy_theme_2023.3.0_ng2.less

@@ -160,6 +160,11 @@ html, body {
     border-color: @main-color-light;
 }
 
+.bts-label:focus, .bts-datalabel:focus {
+    outline-color: @main-color-light;
+    border-color: @main-color-light;
+}
+
 /* Label */
 .svy-label,
 .bts-label {