[PyKDE] Qt progress example with minor glitch

[Hans-Peter Jansen]

Hi PyQties,

after returning from holiday, I needed something easy to start with:
looking through the Qt examples, I hadn't touched before, I found
progress.

While the translation was pretty straight forward, I've come across
these stranglets:
 - cancel a custom label progress dialog don't cancel its timer 
   (although I've tried hard to kill it explicitly).
 - sometimes cancel triggers these messages:

X Error: BadWindow (invalid Window parameter) 3
  Major opcode:  20
  Resource id:  0x16bce29
X Error: BadWindow (invalid Window parameter) 3
  Major opcode:  15
  Resource id:  0x16bce29
X Error: BadWindow (invalid Window parameter) 3
  Major opcode:  40
  Resource id:  0x16bce29

   It happens also with the c++ version, so I'm not really troubled...

I couldn't resist from modifying its visual appearance slightly, and 
delayed the timer interval to behave a bit more cooperative (unlike its
ancestor).

Comments welcome!

Hans-Peter
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