Upgrade Fluent UI v8 (#688)

Co-authored-by: Steve Faulkner <southpolesteve@gmail.com>

src/Explorer/Panes/ExecuteSprocParamsPane/ExecuteSprocParamsPane.tsx

@@ -1,5 +1,5 @@
-import { useBoolean } from "@uifabric/react-hooks";
-import { IDropdownOption, IImageProps, Image, Stack, Text } from "office-ui-fabric-react";
+import { useBoolean } from "@fluentui/react-hooks";
+import { IDropdownOption, IImageProps, Image, Stack, Text } from "@fluentui/react";
 import React, { FunctionComponent, useState } from "react";
 import AddPropertyIcon from "../../../../images/Add-property.svg";
 import StoredProcedure from "../../Tree/StoredProcedure";

src/Explorer/Panes/ExecuteSprocParamsPane/InputParameter.tsx

@@ -7,7 +7,7 @@ import {
   Label,
   Stack,
   TextField,
-} from "office-ui-fabric-react";
+} from "@fluentui/react";
 import React, { FunctionComponent } from "react";
 import AddPropertyIcon from "../../../../images/Add-property.svg";
 import EntityCancelIcon from "../../../../images/Entity_cancel.svg";