Custom / changable transaction edit dialog size?

[jensb]

This may seem trivial and I may have overlooked something but it makes managing and editing transactions in Fava a bit painful for me.

Issue:
The default dialog when clicking on a transaction to edit does not use the window width, but is too narrow to show the full narration text (in most cases) and the height is just a bit too small to completely show all rows (probably due to hover-only scrollbars in todays's browsers). The screenshot below was done in Firefox on Linux.

Can we adjust this and make this popup dialog a bit higher and wider?
I'm fine with hardcoding this for my personal use for now, and I could try to make this an option and submit a PR, but I'd need to know where to start. I'm familiar with Python and HTML/CSS, but not Svelte (yet). A pointer would be helpful.

Thanks!