[maven-release-plugin] copy for tag org.gvsig.legend.proportionalsymbols.app.mainplugin-1.0.7
refs #3211 Actualizada la version del parent y sustituidos los JIncrementalNumberField por JNumberSpinner
refs ##3203 Arreglado error en el informe de "Persistence factories" relacionada con ProportionalSymbolsLegend
Updated pom.xml files, assembly file name, etc.
Fixed imports
Set orange as initial color in background symbol preview button
Initial import.