MWUI: Vertically align the icon pseudo elements

The icon element's image was not always in the vertical center depending
on the line height of the icon.

Bug: T142391
Change-Id: I4d73c27286a623cb82e2f8801c919ae6f8007e59

diff --git a/resources/src/mediawiki.ui/components/icons.less b/resources/src/mediawiki.ui/components/icons.less
index 9b9d324..b4edc50 100644 (file)
--- a/resources/src/mediawiki.ui/components/icons.less
+++ b/resources/src/mediawiki.ui/components/icons.less
@@ -26,6 +26,7 @@
 
 .mw-ui-icon {
        position: relative;
+       line-height: @iconSize;
        min-height: @iconSize;
        min-width: @iconSize;