add margin-bottom to form-inline in sidebar

build/scss/_main-sidebar.scss

@@ -923,3 +923,6 @@
 .sidebar .form-inline .input-group {
   width: 100%;
 }
+.sidebar nav .form-inline {
+  margin-bottom: .2rem;
+}

dist/css/adminlte.css

@@ -12794,6 +12794,10 @@ body.sidebar-collapse:not(.sidebar-mini-md):not(.sidebar-mini) .main-header::bef
   width: 100%;
 }
 
+.sidebar nav .form-inline {
+  margin-bottom: .2rem;
+}
+
 .logo-xs,
 .logo-xl {
   opacity: 1;