Make the demos show their content fully in the guides

[AMBudnik]

Description

Some of the demos are added to guides, but they are cut in a way that makes the DX rather poor. We should resize the example's element to enhance the guide.

Screenshots

(more than half of the demo is under scroll, plus it is covered by the buttons)

Related pages

• Custom functions guide - https://hyperformula.handsontable.com/guide/custom-functions.html#working-demo (more than half of the demo is not visible)
• Advanced usage - https://hyperformula.handsontable.com/guide/advanced-usage.html#demo (not that bad, but we could add those 50px more)
• Batch operations - https://hyperformula.handsontable.com/guide/batch-operations.html#what-you-can-t-batch (a few more pixels and we won't have the scrollbar)
• Sorting data - https://hyperformula.handsontable.com/guide/sorting-data.html#data-sorting-demo (a few more pixels and we won't have the scrollbar)
• Internationalization - https://hyperformula.handsontable.com/guide/i18n-features.html#en-us-configuration

My environment

Browser: Chrome 120
System: MacOS Ventura
Browser Zoom: 100%
System Scale: 100%