`brush_type` popup window icons use incorrect scaling ratio

[狼人小林]

version: main branch after 1.3.5

Settings 1:

Settings 2:

It seems that the scaling ratio of these three icons is related to the font size, which is a bit strange. They should load according to the value of uiscaling.

By the way, for the default theme, should the following two be equivalent (In terms of display effect)?

<theme name="" screenscaling="2" uiscaling="1">

<theme name="" screenscaling="1" uiscaling="2">

[David Capello]

Thanks for reporrting this bug @TakWolf!

By the way, for the default theme, should the following two be equivalent (In terms of display effect)?

Probably yes, not sure if it would be better to have a scaling="2" or something like that that can match any screenscaling*uiscaling=2=scaling combination.