Changed import/export -> unpack/pack wording

src/main/resources/omt-package.properties

@@ -23,7 +23,7 @@ omt.menu.import=Unpack project from OMT file...
 omt.menu.export=Pack project as OMT file...
 omt.menu.export.delete=Pack and delete project...
 omt.chooser.import=Select the OMT package to import
-omt.chooser.export=Select location and name of the OMT export
+omt.chooser.export=Select location and name of the OMT package
 omt.chooser.filter=OMT Package file
 omt.invalid.package=Invalid OMT package, file "omegat.project" is missing.
 omt.update.package=Updating current project with OMT package content
@@ -34,10 +34,10 @@ omt.dialog.overwrite_package=Another package with the same name already exists.\
 omt.dialog.overwrite_package.title=Overwrite OMT Package
 omt.dialog.overwrite_package.created=OMT Package successfully created.
 omt.dialog.overwrite_package.created.title=OMT Package
-omt.dialog.delete_package=The package has been successfully imported.\nDo you want to delete the imported OMT Package?
-omt.dialog.delete_package.title=Delete Imported OMT Package
-omt.status.importing_omt=Importing OMT package...
+omt.dialog.delete_package=The package has been successfully unpacked.\nDo you want to delete the OMT Package?
+omt.dialog.delete_package.title=Delete unpacked OMT Package
+omt.status.importing_omt=Unpacking OMT package...
 omt.status.omt_imported=OMT package imported...
-omt.status.exporting_omt=Exporting OMT package...
-omt.status.omt_exported=OMT package exported...
+omt.status.exporting_omt=Packing OMT project...
+omt.status.omt_exported=OMT project packaged...
 omt.status.delete_project=Deleting project...