[Feature Request] add a prompt to confirm deleting the "New List" in Preferences->Auto-Replace settings

[valeriiaaproductengine]

Environment

Second Life Release 7.1.8.9103842320 (64bit)
Release Notes

You are at 176.6, 70.7, 21.5 in Product Engine located at simhost-0d30785e85ea9fc12.agni
SLURL: http://maps.secondlife.com/secondlife/Product%20Engine/177/71/21
(global coordinates 336,817.0, 307,271.0, 21.5)
Second Life Server 2024-04-13.8669470296
Release Notes

CPU: 11th Gen Intel(R) Core(TM) i5-11260H @ 2.60GHz (2611.2 MHz)
Memory: 16111 MB
OS Version: Microsoft Windows 10 64-bit (Build 19045.4291)
Graphics Card Vendor: NVIDIA Corporation
Graphics Card: NVIDIA GeForce RTX 3050 Laptop GPU/PCIe/SSE2

Windows Graphics Driver Version: 31.0.15.2879
OpenGL Version: 4.6.0 NVIDIA 528.79

Window size: 1920x1001
Font Size Adjustment: 96pt
UI Scaling: 1
Draw distance: 128m
Bandwidth: 3000kbit/s
LOD factor: 1.5
Render quality: 4
Texture memory: 4095MB
Disk cache: Max size 1619.2 MB (0.4% used)

J2C Decoder Version: KDU v7.10.4
Audio Driver Version: FMOD Studio 2.02.20
Dullahan: 1.14.0.202310131404
CEF: 118.4.1+g3dd6078+chromium-118.0.5993.54
Chromium: 118.0.5993.54
LibVLC Version: 3.0.16
Voice Server Version: Vivox 4.10.0000.32327.5fc3fe7c.5942f08

Packets Lost: 44/88,933 (0.0%)
May 30 2024 06:56:25

Description

If you need to delete a list, it is deleted instantly without a confirmation prompt in the Auto-Replace settings.

Location of the proposed Feature:

1. Open the Viewer.
2. Click "Me→Preferences→Chat tab".
3. Click on the "Auto-Replace" button.
4. Click on the "New list" button in the "Auto-Replace settings" floater.
5. Give the name for the new list and click the "OK" button.
6. Add couple replacements to the new list
7. Select the newly crеated list and click the "Delete" button.

The list was instantly deleted. It would be appropriate to add a confirmation prompt like in the expected.png screenshot. (The prompt option may be different).

Expected.png screenshot:

[akleshchev]

After checking for a bit, I decided that:

1. There is no point confirming removal of empty lists since nothing of value gets lost and user still can cancel changes.
2. Deleting a non-empty list should show that list isn't empty (aka, confirmation should show content count) in case user wasn't aware that list was large or something like that.

P.S. Might be a good idea to add a 'there are unsaved changes' when user hits cancel on the whole floater.

[igorlproductengine]

Passed QA.

Verified on the Second Life Release 7.1.9.9469671545 (64bit) on Win10/OSX in the scope of https://github.com/secondlife/iqa/issues/258.