47.5

• Synchronize device enabled state when adding device [Yao; !4188]
  
• Do not use modifiers if surface should be sharable [Michel; !4219]
  
• Fix notifying shell about modifier-only keyboard layout switches
  [Olivier; !4232, !4237]
  
• Fixed crashes [Jonas, Philip; #3839, !4222]
  
• Misc. bug fixes and cleanups [Michel, Alessandro, Daniel; !4208, !4225, !4228]
  

Contributors:
Alessandro Astone, Michel Dänzer, Olivier Fourdan, Daniel van Vugt,
Yao Wei (魏銘廷), Philip Withnall, Jonas Ådahl
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