NaN shows up when adjusting token/LoRA strength with Ctrl+Arrow keys

[arzam16]

Commit: 8bd7e0568f4d942f4d17bcc7a6966e92d2b897eb Tested on: Firefox 130 running in Safe mode (no extensions, no themes, all defaults), the OS is the latest Linux Mint Steps to reproduce:

1. Launch webui, wait for it to load
2. Type anything into the prompt box
3. Select any token, doesn't matter how selection is done - could be with double mouse click, Shift+Ctrl+Arrows etc.
4. Press Ctrl+Arrow Up or Ctrl+Arrow Down, witness token turning into (token:NaN) :clown_face: Does anything related to this issue pops up in the Browser Console: no