Lots of fixes

• Added support for the CustomMenu attribute in the inspector
• Added search for replacements for generic methods if the input data is not of 'object' type. Will try to find a method with the same name and the same arguments (experimental)
• Reworked initobj for structured data types. A constant is now used instead of a constructor.
• Reworked switch. The jump table is now implemented in assembler instead of using an array of addresses.
• Fixed build of explicit interface methods (there was no jump to the end of the program). Also empty methods are no longer included in the build.
• Fixed arithmetic and logical operations with small data types (byte and short)
• Fixed some enum operations
• Fixed situations with incorrect use of tmp variables