Be more precise in what gets redrawn

There are far too many instances of gtk_widget_queue_draw() all over, I suspect to paper over redraw issues. Removing all of these (and replacing them with individual or all icon invalidation) should be fine to do. There's still the possibility that some areas won't get invalidated when they need to be, but they should be fixed when found. The only time we should _queue_draw() is when the backdrop changes.

Closes #284 (closed).

mentioned in issue #284 (closed)

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• 8c75be07 - Be more precise in what gets redrawn

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• debf7af8 - 1 commit from branch xfce:master
• 385f463e - Be more precise in what gets redrawn

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mentioned in issue #261 (closed)

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• cb59bcf7 - Be more precise in what gets redrawn

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• cb59bcf7...ef76f8ce - 2 commits from branch xfce:master
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• 094884be - Don't invalidate the icon view pixbuf cache on style update

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• 15d10199 - Resize icon grid if style changes affect slot/cell size
• 5e8eec0c - Only resize grid on size_allocate if the allocation actually changed
• ce2c5f6e - Compute icon invalidation rect more generously

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• 1ab3601b - Only redraw icon text when focus changes

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merged