Char Factory 0.4.5: simulator, ZSS and saving fixes

Fixes for the reported issues, a simulator that no longer hangs, ZSS that opens and saves as ZSS, and safer saving for old characters.

Added

• Simulator shows the advantage on hit and on guard, with blockstun and cancel windows.
• Zoom out for giant sprites, centered on the mouse.
• Timeline: arrow keys move between frames and the timing can be locked.
• Show or hide the right panel (Ctrl+Alt+N).
• ZSS loops run in the simulator.
• Updated for Ikemen GO 1.0.

Fixed

• The simulator no longer hangs on moves that loop through states in the same tick.
• Effects and helpers that never ended in the simulator now end.
• Clicking a frame on the timeline selects it without changing its time.
• ZSS files open, show and save as ZSS.
• Ikemen constants are no longer flagged as errors.
• Saving no longer damages Japanese text or SFF v1 palettes.
• Damaged or truncated sprites no longer break the editor or block saving.
• The command line shows short errors instead of a traceback.

Full Changelog: v0.4.0...v0.4.5