misc: use dance.inPrompt instead of !textInputFocus

`textInputFocus` doesn't seem to exist, but until recently this wasn't a
problem.

In Insiders 1.90, `!textInputFocus` evaluates to true in quick-open boxes, so
arrow keys no longer work in these input boxes because of Dance. This change
adds a custom Dance context key, `dance.inPrompt`, to only enable input box
keybindings in prompts created by Dance.

meta.ts

@@ -539,7 +539,7 @@ export function parseKeys(keys: string) {
       case "prompt":
         assert(!negate);
         whenClauses.splice(whenClauses.indexOf("editorTextFocus"), 1);
-        whenClauses.push("inputFocus && !textInputFocus");
+        whenClauses.push("inputFocus && dance.inPrompt");
         break;
 
       default: {

package.build.ts

@@ -78,7 +78,7 @@ const selectionDecorationType = {
 // ============================================================================
 
 const version = "0.5.14",
-      preRelease = 2;
+      preRelease = 3;
 
 export const pkg = (modules: Builder.ParsedModule[]) => ({
 

src/api/prompt.ts

@@ -57,6 +57,9 @@ export function prompt(
       });
     }
 
+    const contextKey = "dance.inPrompt";
+    const setContextPromise = vscode.commands.executeCommand("setContext", contextKey, true);
+
     const disposables = [
       inputBox,
       inputBox.onDidChangeValue(updateAndValidateValue),
@@ -100,6 +103,10 @@ export function prompt(
       inputBox.onDidHide(() => {
         disposables.forEach((d) => d.dispose());
 
+        setContextPromise.then(() =>
+          vscode.commands.executeCommand("setContext", contextKey, false),
+        );
+
         const reason = context.cancellationToken?.isCancellationRequested
           ? CancellationError.Reason.CancellationToken
           : CancellationError.Reason.PressedEscape;