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See 18d95dc9

Use simpler icons.
paint-none will have to be replaced in the future, but we do not have
any similar icons with better names now.

it stays there just for input area

use the c++ part aain for hasCloseableActiveWindow

when the last window is closed, close the task switcher

errors--

use the kwin effect now, use proper api
and never minimize any window

* no more randomly minimizing windows
* use showdesktop effect
* use directly kwayland for show desktop

almost entirely port the task switcher to the new
libtaskmanager. still needs porting
for the single close current window button

close should always close now

peek fixed
unintended task activation shouldn't happen anymore