Introduced by 11c7e15a.

Acked-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

Attributes, uniforms, varyings, and constants are shown with a
distinguished icon that is different from regular variables.

The Qt variant is almost exactly the same as GLSL/ES,
so there is little point having a separate variant code.

Some more value fixing/support double-quoted commands in extension.
Functionality for printing command help.

Structures with accessible members.

Reviewed-by: Roberto Raggi

Reviewed-by: Roberto Raggi

Reviewed-by: Roberto Raggi

Well, it's not very advanced but it is probably good enough for now.

The "value might be 'undefined'" warning triggered whenever the static
expression evaluator failed to produce a value. At the moment, it does
so for almost all non-trivial expressions.

The warning is now disabled.

Task-number: QTCREATORBUG-3208

Type categories are now handled at semantic analysis time
so we don't need to track them at syntax analysis time.

Add infrastructure for simple dumpers in Symbol group.
Fix display of class values.