Make truncation padding on left of node title buttons less aggressive

This padding is too wide, we can be a little less aggresive with the truncation threshold:

The truncation and title button logic was added in https://github.com/Comfy-Org/litegraph.js/pull/1186

┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-4680-Make-truncation-padding-on-left-of-node-title-buttons-less-aggressive-2456d73d365081999cbedf047b92e3b0) by [Unito](https://www.unito.io)

Start by reviewing the truncation and title-button logic introduced in pull request #1186. Compare the current node title buttons with the attached screenshot, then adjust the truncation threshold so the left padding is less aggressive; the issue is done when titles retain more space without breaking the button layout.

Written by the indexing model from the issue text.