Icon color in toolbar changes after text found with SearchView

[wharnisch]

After having found text with TextView (background color of found text changes to yellow or orange) icon color of some tools in the toolbar also changes. Some of the icons keep the (white) color, some of the icons change to gray color, some of the icons change to black color. This behaviour can be reproduced both for AllCommandsEditorToolbar and for other toolbars derived from EditorToolbar.