luci-mod-status: persist sorting of Wi-Fi associated stations table

Similar to commit 60399256

 from @jow-

Add an ID attribute to the dynamically generated Wi-Fi associated
stations table to persist row ordering choice across reloads.

At the luci-mod-network view, the Wi-Fi associated stations table
already has the same id.

Signed-off-by: Thomas Schröder <tschroeder_github@outlook.com>