Should be possible to paste in to m/z,z pair lists without drag and
dropping.

Should be possible to remove selected items from a m/z,z pair list

It should be possible to define the formula of a monomer on the basis
of distinct groups (subformulas) which bear a name so that they can be
referred to by name when defining fragmentation patterns. This would
give enormous flexibility to define real patterns amongst monomers
that fragment, like for example saying loose the side chain, or proton
loss in ribose, or oxidation in ring...

Upon fragmentation, the ionization rule should be re-read from the
XpertEdit window so that ionizations might change live. For example,
switch from negative to positive mode in mass spec of
oligonucleotides.

Fragmentation framework needs rework to include the case of negative
peptide fragmentation where b ions correspond to the loss of CO_2
until the very last monomer, which is not currently possible with the
present for loop.

The definition of the fragmentation pattern might need some variable
like "add the ionization rule".

for ( int i = 0, c = l.size(); i < c; ++i ) to optimize lists ?

Preset mass data when calling m/z ratio calculator from a sequence editor window.

Arbitrary mass search should take into account the cross-links.
