after i switch sound outputs(b.e. plug in headphones) when the two outputs muted state is different and try to toggle mute, plasma OSD displays wrong mute status

Reproducible: Always

Steps to Reproduce:
1. there are two sound outputs(b.e. load speaker and headphones)
2. unmute both outputs
3. mute the active output
4. switch to another output
5. mute another output

Actual Results:  
plasma OSD shows that output is being unmuted when performing last action

Expected Results:  
plasma OSD should show that output is being muted

pulseaudio is used for remembering each output's state