Missing icons about bootstrap-datepicker-rails HOT 6 CLOSED

/*
 * This is a manifest file that'll be compiled into application.css, which will include all the files
 * listed below.
 *
 * Any CSS and SCSS file within this directory, lib/assets/stylesheets, vendor/assets/stylesheets,
 * or vendor/assets/stylesheets of plugins, if any, can be referenced here using a relative path.
 *
 * You're free to add application-wide styles to this file and they'll appear at the top of the
 * compiled file, but it's generally better to create a new file per style scope.
 *
 *= require_self
 * require jquery.ui.all
 *= require bootstrap-datepicker
 *= require_tree .
*/

// Set the correct sprite paths
$iconSpritePath: image-path('glyphicons-halflings.png');
$iconWhiteSpritePath: image-path('glyphicons-halflings-white.png');

// Core variables and mixins
@import "bootstrap/variables"; // Modify this for custom colors, font-sizes, etc
@import "bootstrap/mixins";

// CSS Reset
@import "bootstrap/reset";

// Grid system and page structure
@import "bootstrap/scaffolding";
@import "bootstrap/grid";
@import "bootstrap/layouts";

// Base CSS
@import "bootstrap/type";
@import "bootstrap/code";
@import "bootstrap/forms";
@import "bootstrap/tables";

// Components: common
@import "bootstrap/sprites";
@import "bootstrap/dropdowns";
@import "bootstrap/wells";
@import "bootstrap/component-animations";
@import "bootstrap/close";

// Components: Buttons & Alerts
@import "bootstrap/buttons";
@import "bootstrap/button-groups";
@import "bootstrap/alerts"; // Note: alerts share common CSS with buttons and thus have styles in buttons.less

// Components: Nav
@import "bootstrap/navs";
@import "bootstrap/navbar";
@import "bootstrap/breadcrumbs";
@import "bootstrap/pagination";
@import "bootstrap/pager";

// Components: Popovers
@import "bootstrap/modals";
@import "bootstrap/tooltip";
@import "bootstrap/popovers";

// Components: Misc
@import "bootstrap/thumbnails";
@import "bootstrap/labels";
@import "bootstrap/badges";
@import "bootstrap/progress-bars";
@import "bootstrap/accordion";
@import "bootstrap/carousel";
@import "bootstrap/hero-unit";

// Utility classes
@import "bootstrap/utilities"; // Has to be last to override when necessary

body { padding-top: 60px; }

@import "bootstrap-responsive";