Add batch actions to local user table

- Create TableToolbar component for table batch actions
- Added Toast warning type and toast title message translations
- Update vue-i18n package to latest v8.15.3 to use improved
  pluarlization features

Signed-off-by: Yoshie Muranaka <yoshiemuranaka@gmail.com>
Change-Id: I455beba4f56b8209b1201bbc5ff3f616e960d189
diff --git a/src/assets/styles/_toast.scss b/src/assets/styles/_toast.scss
index 3f2f08c..538f996 100644
--- a/src/assets/styles/_toast.scss
+++ b/src/assets/styles/_toast.scss
@@ -29,4 +29,8 @@
 
 .b-toast-danger .toast {
   border-left-color: $danger!important;
+}
+
+.b-toast-warning .toast {
+  border-left-color: $warning!important;
 }
\ No newline at end of file