optimize style sheets, support tabIndex in popup

lib/ui/css/grid.scss

@@ -1,4 +1,4 @@
-@import './functions/func.scss';
+@import "./functions/func.scss";
 
 .grid {
     position: relative;
@@ -43,16 +43,11 @@
         --spacing-cell: 6px 4px 6px 8px;
     }
 
-    &:focus,
-    &:focus-visible {
-        outline: none;
-    }
+    @include outline();
 
     &,
     input[type="text"],
-    textarea,
-    .drop-wrapper>.drop-header>.drop-text,
-    .drop-wrapper>.drop-box>.drop-list {
+    textarea {
         font-size: var(--font-size);
         font-family: var(--font-family);
     }
@@ -238,10 +233,7 @@
                         width: 100%;
                         padding: 0;
 
-                        &:focus,
-                        &:focus-visible {
-                            outline: none;
-                        }
+                        @include outline();
 
                         &:disabled {
                             color: var(--text-disabled-color);