feat(cloudwatchlogs): preserve position while loading items #3934

Problem:
When trying to select a CloudWatch Log Stream, the UI scrolls to the top
while fetching all streams, which is very difficult to use.

Solution:
Set `keepScrollPosition = true` by default.
Closes #2379

Author: justinmk3

.changes/next-release/Feature-bd1ff59d-583c-4611-9e14-3e47a9014e72.json

@@ -0,0 +1,4 @@
+{
+	"type": "Feature",
+	"description": "CloudWatch Logs: Preserve quickpick menu position when loading more items."
+}

src/shared/ui/picker.ts

@@ -47,6 +47,7 @@ export function createQuickPick<T extends vscode.QuickPickItem>({
     buttons?: vscode.QuickInputButton[]
 }): vscode.QuickPick<T> {
     const picker = vscode.window.createQuickPick<T>()
+    picker.keepScrollPosition = true
 
     if (options) {
         picker.title = options.title

src/shared/ui/pickerPrompter.ts

@@ -63,6 +63,8 @@ export type ExtendedQuickPickOptions<T> = Omit<
     errorItem?: DataQuickPickItem<T>
     /** Description for recently used item */
     recentlyUsed?: string
+    /** Defined on `vscode.QuickPick` but not `vscode.QuickPickOptions` 🤷 */
+    keepScrollPosition?: boolean
 }
 
 /** See {@link ExtendedQuickPickOptions.noItemsFoundItem noItemsFoundItem} for setting a different item */
@@ -85,6 +87,7 @@ export const defaultQuickpickOptions: ExtendedQuickPickOptions<any> = {
     ignoreFocusOut: true,
     noItemsFoundItem: defaultNoItemsItem,
     errorItem: defaultErrorItem,
+    keepScrollPosition: true,
 }
 
 type QuickPickData<T> = PromptResult<T> | (() => Promise<PromptResult<T>>)