Fix and improve conditional modifier #2653
Merged
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This is more complicated then I had hoped but I guess it's necessary. It introduces a parse-stack that contains all parsing methods. This allows modifiers to be injected into different points of the stack, not all at once. Now the conditional modifier can correctly run before variables, while the autopause modifier can correctly run after the variables.
This should also provide more flexibility later on if we need to have better control over other parsing order.
Compatibility breaking: This changes the signature of the Text.parse_text() method, removing all the individual flags.