[Suggestion] Visual adjustment on the wireless icon

[lxwndr]

I suggest that the exclamation icon, which is displayed over the wireless icon, when there is no connection, be shown in yellow.

Currently, the icon is not visible (because it is the same color). If only the exclamation point is displayed in yellow, there will be more prominence.

dde-dock 5.4.10-1
deepin 20.2 (1040) / OsBuild=11038.002