src/goEnvironment: make the window reload request visible

After the Go version change action, the extension must
restart. Make the reload request message modal, so it
is hard to miss.

Change-Id: I834f159a6329ea7f6ccf9beee69b5dae6d904436
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/450675
Reviewed-by: Jamal Carvalho <jamal@golang.org>
Reviewed-by: Peter Weinberger <pjw@google.com>
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: kokoro <noreply+kokoro@google.com>

src/goEnvironmentStatus.ts

diff --git a/src/goEnvironmentStatus.ts b/src/goEnvironmentStatus.ts
index 7902b84..d086f4f 100644
--- a/src/goEnvironmentStatus.ts
+++ b/src/goEnvironmentStatus.ts
@@ -187,8 +187,11 @@
 	// prompt the user to reload the window.
 	// promptReload defaults to true and should only be false for tests.
 	if (promptReload) {
-		const choice = await vscode.window.showInformationMessage(
+		const choice = await vscode.window.showWarningMessage(
 			'Please reload the window to finish applying Go version changes.',
+			{
+				modal: true
+			},
 			'Reload Window'
 		);
 		if (choice === 'Reload Window') {