Don't set a Window Icon on Plamsa::Dialog

Review Request #128484 - Created July 19, 2016 and discarded

Information
David Edmundson
plasma-framework
Reviewers
plasma
It's practically never visible.

Window flags are always masked with FramelessWindowHint and we always
have the state NET::SkipTaskbar | NET::SkipPager set.

(There is theoretically a code path that would allow an icon to be
visible in some kwin effects that overlay icons..but not triggerable by
anything in Plasma, at which point why would you want a Plasma icon
anyway)

This saves a bit of memory (up to 512K) as window icons are always
loaded at every size to set the _NET_WM_ICON.

  
Martin Flöser
David Edmundson
Review request changed

Status: Discarded

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