Prior to this change the "Save As.." command would take a different action
based on the state of the editor which could be confusing. There are now
separate commands for saving the currently selected library or symbol.
CHANGED: The implicit save as menu entry which would save the currently
selected library if no symbol was selected or the current symbol to a
different library. There are now separate save as commands for libraries
and symbols to make it obvious what is being saved.
The accelerator strings really shouldn't be part of the translation,
and some translations have cause the accelerator keys to be incorrectly
handled. It is simpler to make it separate and just join them to the
translated string.
Make all accelerator modifiers use lowercased Ctrl instead of CTRL
to be the same as the other modifiers.
Fixes https://gitlab.com/kicad/code/kicad/issues/5992