fix(cloud-styles): fully import bootstrap 3 (#238)

Author: frenautvh

packages/manager/modules/cloud-styles/src/cloud.less

@@ -1,10 +1,6 @@
 @rem-base: rem-base(10px);
 
-@import '~bootstrap/less/variables';
-@import '~bootstrap/less/mixins';
-@import '~bootstrap/less/utilities';
-@import '~bootstrap/less/buttons';
-@import '~bootstrap/less/dropdowns';
+@import '~bootstrap/less/bootstrap';
 @import "~ovh-ui-kit/packages/oui-responsive/_mixins";
 @import "~ovh-ui-kit/packages/oui-color/_variables";
 @import "~ovh-ui-kit/packages/oui-navbar/_variables";