For import added the option for user to enter text that he wants to
remove as a prefix or suffix from the names of the package, class,
property or operation elements that are being imported.
Made so that the components on the standard form are aligned to the
left.
Added remove option for texts to be removed during import of UML
diagram.
Merge branch 'master' of https://github.com/KROKIteam/KROKI-mockup-tool