undo/redo doesn't work well

[swiftech]

OS: macOS Catalina
Version: 1.4.10

Create a puml file, input something, save, input something again, then crtl+z, everything you inputed will be removed, not just what you inputed after latest save. and also, the redo in menu and ctrl+shift+z are both unavailable.

[raydac]

try snapshot

[raydac]

@swiftech what news about snapshot?

[swiftech]

I tried but still have some problem.
eg: select multiple lines and hit Tab, these lines will be indented together, but when I ctrl+z once, the functionality only undo latest line, I have to ctrl+z multiple times to undo the whole indentation.

besides, the case inputing a whole word and undo the input has the same problem as the indentation.