Fixing width of mismatched residue.

git-svn-id: https://svn.code.sf.net/p/genoviz/code/trunk@15071 80d5a9c2-7d8c-4c9f-9369-4e03bca4d2bd
Allow negative values for basic math operation.

git-svn-id: https://svn.code.sf.net/p/genoviz/code/trunk@15073 80d5a9c2-7d8c-4c9f-9369-4e03bca4d2bd
Fix setting negative max value.

git-svn-id: https://svn.code.sf.net/p/genoviz/code/trunk@15074 80d5a9c2-7d8c-4c9f-9369-4e03bca4d2bd
Merge remote-tracking branch 'upstream'