Fix overzealous entering of folded spans in coordsChar
Overhaul selection drawing algorithm again

To better deal with drawing selections around replacedWith widgets.
Fix bug in drawing of nested collapsed spans
[foldcode addon] Support scanUp and minFoldSize options
[show-hint addon] Add closeOnUnfocus option
[brace-fold addon] Add includeRangeFinder and importRangeFinder

For folding Java and C/C++ style import/include blocks.