We just pushed two small changes that will save a lot of time to power users.
We now enable you to use the up and down arrows when dealing the the dropdowns in the Property Editor (either to pick a font, or to build an expression). This combined with search-by-typing will make creating expressions quite fast.
We’ve also made that when there is only one page that fits what you’ve typed in the search box, pressing enter will take you there.
As usual with new stuff, let us know if you see weird behaviors (through a bug report)