Issue #1859

Fix next line after block being incorrectly folded into the block
Fix detection of the end of a code block

Issue #1865

Issue #1739

Also adds parameters to a range's clear event.

Issue #1678
Issue #1679

Use it to prevent some unneeded state computation.

Issue #1653

Issue #1625

Issue #1625

Use it to make xml-fold more robust, and matchbrackets much faster.

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

(Old newFoldFunction interface preserved for backwards-compatibility.)

Too specialized. Out of scope.

Closes #1360