Button CSS rule for sidebar off-canvas navigation is too strong

Problem/Motivation

Button CSS rules from bs_base/themes/bs_bootstrap/sass/components/partials/_navbar-offcanvas.scss

.navmenu.in {
   ....

  .btn {
    background-color: $navbar-offcanvas-btn-color-bg;
    @if ($navbar-offcanvas-color) {
      border: $input-btn-border-width solid $navbar-offcanvas-color;
    }
    @if ($navbar-offcanvas-btn-color) {
      color: $navbar-offcanvas-btn-color;
    }
  }

  ...
}

is too strong and will override regular button rules like btn-primary, etc.

This rule is probably added for a close off-canvas navigation button.

Proposed resolution

We should modify rule selector and target only close and btn-ghost buttons.