Revert "Network stats: Hide if there's no traffic (1/2)"

This reverts commit b906140dc19283b0e97a4ed27cf8197172ffc223.
Revert "Network stats custom colors (1/2)"

This reverts commit 1a2872c0349aacd8e171980d27869c3e78e046a7.
Revert "[1/2] Base: Network traffic indicator"

This reverts commit 8405c5be9bf8211becada1c92744bc9b835f4a00.
SystemUI: Network speed indicator (1/2)
[1/2] Base: Upgrade network traffic meter