feat(b-table): default the row select feature selected-variant to the active variant (#4128)

Author: tmorehouse

src/components/table/README.md

@@ -1541,12 +1541,12 @@ example).
 
 The `selected-variant` can be any of the
 [standard (or custom) bootstrap base color variants](/docs/reference/color-variants), or the special
-[table `active` variant](/docs/reference/color-variants#table-variants) which takes precedence over
-any specific row or cell variants.
+[table `active` variant](/docs/reference/color-variants#table-variants) (the default) which takes
+precedence over any specific row or cell variants.
 
 For accessibility reasons (specifically for color blind users, or users with color contrast issues),
 it is highly recommended to always provide some other visual means of conveying that a row is
-selected, such as shown in the example below.
+selected, such as a virtual column as shown in the example below.
 
 ```html
 <template>
@@ -1559,7 +1559,6 @@ selected, such as shown in the example below.
       ref="selectableTable"
       selectable
       :select-mode="selectMode"
-      selected-variant="active"
       :items="items"
       :fields="fields"
       @row-selected="onRowSelected"

src/components/table/package.json

@@ -235,7 +235,7 @@
           },
           {
             "prop": "selectedVariant",
-            "description": "Bootstrap color theme variant to set selected rows to. use any of hte standard Bootstrap theme variants, or the special table row variant 'active'"
+            "description": "Bootstrap color theme variant to set selected rows to. Use any of the standard Bootstrap theme color variants, or the special table row variant 'active' (default). Set to an empty string to not use a variant"
           },
           {
             "prop": "showEmpty",

src/utils/config-defaults.js

@@ -152,7 +152,7 @@ export default deepFreeze({
     variant: null
   },
   BTable: {
-    selectedVariant: 'primary',
+    selectedVariant: 'active',
     headVariant: null,
     footVariant: null
   },