Usability issue: placeholders looks like normal text in the Flat skin

With the Flat skin selected, the placeholders for text/textFilter/numberFilter etc. look very close to normal text. I have pretty good (though not perfect) vision, and I can’t easily distinguish between them:

https://snippet.webix.com/b66wfue7

If you switch the snippet skin to Material, the placeholders look clearly different.

Thank you for reporting, we will adjust the placeholders in Flat skins to be more distinguishable.