Fixes microsoft#162243 (microsoft#162376)

Author: TylerLeonhardt

src/vs/base/parts/quickinput/browser/quickInput.ts

@@ -1166,11 +1166,14 @@ class InputBox extends QuickInput implements IInputBox {
 		if (!this.visible) {
 			return;
 		}
+
+		this.ui.container.classList.remove('hidden-input');
 		const visibilities: Visibilities = {
 			title: !!this.title || !!this.step || !!this.buttons.length,
 			description: !!this.description || !!this.step,
 			inputBox: true, message: true
 		};
+
 		this.ui.setVisibilities(visibilities);
 		super.update();
 		if (this.ui.inputBox.value !== this.value) {
@@ -1186,7 +1189,6 @@ class InputBox extends QuickInput implements IInputBox {
 		if (this.ui.inputBox.password !== this.password) {
 			this.ui.inputBox.password = this.password;
 		}
-
 	}
 }