Hi, Carsten,
I think this is good - so if you agree, I will apply your patch
and rename the variable to ...persistent-filter
That would be great, thanks.
The main thing I am missing now is a command to edit the filter
in the minibuffer. Or, if there's a separate persistent filter,
perhaps the command could edit that if given an argument.
It might also be useful to save filters to registers and restore
them later.
I guess a command to edit the filter, and a dedicated history
variable
for that command would be good enough? Would you like to make this
command and send me a combined patch with both changes?
Alternatively, what do you think of the idea of saving
a complete agenda view to a register (including the filter)?
The register would contain all the information necessary to
recreate the agenda view, and there would be a command to
restore it.