Fix css rule and remove using jQuery

[rajniszp]

This PR does two things:

1. fixes the invalid css rule - there should be no spaces between number and unit
2. removes the need of jQuery by using the native javascript methods

[Copilot]

Pull Request Overview

This PR fixes an invalid CSS rule by removing spaces between numbers and units, and replaces jQuery usage with native JavaScript methods to eliminate dependencies.

• Replaces jQuery's outerHeight() method with native getBoundingClientRect().height
• Fixes CSS spacing issue between numeric values and units

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

The replacement of $(bigWrapper).outerHeight() with getBoundingClientRect().height may not be equivalent. jQuery's outerHeight() includes padding, border, and optionally margin, while getBoundingClientRect().height includes padding and border but not margin. Consider using offsetHeight instead for closer equivalence to jQuery's default behavior.

Suggested change

	maxima = bigWrapper.scrollHeight - bigWrapper.getBoundingClientRect().height + staller;
	maxima = bigWrapper.scrollHeight - bigWrapper.offsetHeight + staller;

[rajniszp]

Right. But if you look few lines before, margin is set to 0, and neither padding nor border are set, therefore it doesn't make a difference.