Use edit-clear-history icon
According to @ngraham (see MR => frameworks/kconfigwidgets!144 (comment 476444)), this icon is more semantically (and visually) appropriate to clear an history.
Edited by Alain Laporte
According to @ngraham (see MR => frameworks/kconfigwidgets!144 (comment 476444)), this icon is more semantically (and visually) appropriate to clear an history.