[6.x] Improve progress states (#13690)

Author: jaygeorge

resources/js/composables/progress-bar.js

@@ -1,6 +1,8 @@
 import { ref, watch } from 'vue';
 import progress from 'nprogress';
 
+progress.configure({ showSpinner: false });
+
 const progressing = ref(false);
 const progressNames = ref([]);
 const timer = ref(null);

src/CP/Color.php

@@ -414,7 +414,7 @@ public static function defaults(bool $dark = false): array
             'dark-content-bg' => self::Zinc[900],
             'dark-content-border' => self::Zinc[950],
             'global-header-bg' => self::Zinc[800],
-            'progress-bar' => self::Indigo[700],
+            'progress-bar' => self::Volt,
             'focus-outline' => self::Blue[400],
             'ui-accent-bg' => self::Indigo[700],
             'ui-accent-text' => 'var(--theme-color-ui-accent-bg)',