Tree Filter and Speed Search widgets: use colors of the Search panel — specify SpeedSearch colors in themes because otherwise they can masked by "*"

(cherry picked from commit c87106e049e9579b917bc85d500e4239b3152a9a)

IJ-CR-96873

(cherry picked from commit 23b357a0a1a3d00d2a4b9d6bf7eb6564c0bf12d8)

GitOrigin-RevId: 123b5f862cb3c2ec9df86ff6b99ec683952dcb36