Allow a per-tree setting to specify the character encoding used by the source code.
Include the value for constants in popup menus.
Fix crashes when trying to evaluate an expression that is value-dependent.
Fix crashes when trying to evaluate an initializer expression
when the initializer is on a different decl.
Fix crashes when trying to evaluate an expression and the type isn't known.
Fix crash in building HTML when encountering a macro with non-ASCII
characters in it.
Move value hints from the popup menu to a tooltip.