This should simplify the merging of the improved lookup context.

Managed is an helper base class that simplify the usage of memory pools.

Introduced pp-scanner.cpp, renamed `pp' to `Preprocessor' and removed useless #includes.

Removed declaration of slot shadowBuildButtonClicked().

Most desktops allow popups to overlap the taskbar. We should allow this
additional space to be used by the completion popup.

You couldn't disable the 'always adjust column widths to contents' logic
cause of an uninitialized boolean that refused to toggle to false.

cursor looks better at the end of a line this way...

Avoids inserting all kinds of funny characters when special keys are
pressed. For some reason, the Delete key now inserts spades. At least
those are more useful than phones, according to hjk.

cursor width manually.

Note that <Esc> is called <Shift-Esc>.