Renamed lots of things, like ScreenSaverThread to ScreenSaverRunner,
refactored code, etc. Much cleaner interfaces and code.
* Fixed a couple of bugs and in the add-on handling, especially some settings
related bugs (ie. testing a screen saver will now use its latest settings,
etc.).
* Correctly implemented DPMS support in ScreenSaverPrefs and the ScreenSaver
preferences application - screen_blanker still ignores them, though.
* It's not yet font sensitive either.
* Changed the input_server add-on to not switch to the screen blanker immediately
when it's in the "blank corner" - doesn't seem to work yet, though (only tested
under Qemu).
* Correctly implemented the "preview" function (before, a screen saver would
never know it rendered a preview).
* Evaluates the return value of BScreenSaver::StartSaver().
* The screen saver thread is no longer killed without notice - it's now
always shut down properly.
* Made the code more robust against failure.
* Introduced some new bugs as well (the screen saver list view doesn't jump to
the selection anymore, for some reason), those will be fixed later (as the
remaining issues).
* Probably some more I forgot about.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17731 a95241bf-73f2-0310-859d-f6bbb57e9c96
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