Debugger: Bring back the expression parser

[chaoticgd]

Description of Changes

The old wxWidgets debugger used the expression parser for the Go To In Memory View and Go To In Disassembly dialogs, however previously the Qt debugger did not. This brings back that missing functionality.

In addition, I've made it so it should now be possible to translate the error messages generated by the expression parser. I've made some changes to its logic to fix an annoyance where it wouldn't accept a hex value starting with a letter (e.g. "f0000") without a base suffx, and to fix some stack buffer overflows.

It fixes an issue introduced by my symbol table PR where it would try to lookup symbols by their demangled names, even though the expression parser only supports parsing mangled/C-style symbol names. The approach I've taken is to build maps of the mangled names in MipsExpressionFunctions::MipsExpressionFunctions since while this restores the previous functionality, I don't think it's ideal. Improving this behaviour would require a more substantial rewrite of the expression parser.

To make the behaviour explained above more practical, I've added an option in the function and global variable symbol trees to copy the mangled name of a symbol to the clipboard.

Rationale behind Changes

This was a very useful feature.

Suggested Testing Steps

• Make sure the go to dialogs still work.
• Make sure the breakpoints dialog still works.
• Try entering expressions containing really long tokens (more than 255 characters) in the breakpoint dialog and observe that PCSX2 doesn't crash now.

[F0bes]

LGTM