[applets/systemtray] Don't needlessly update iconloader
d73c6c4b inadvertendly dropped the check whether the new path is the same as the existing one, so we would update the iconloader on every refresh
The patch looks huge, but ignoring indentation changes it's only adding if (path != m_iconThemePath)
master is unaffected, so targeting 6.0 directly
Edited by Nicolas Fella