fixed warnings in about.component.ts: added missing whitespaces and added class property
fixed warnings in about.component.ts: added missing whitespaces and added class property

tttor/csipb-jamu-prj,tttor/csipb-jamu-prj,tttor/csipb-jamu-prj,tttor/csipb-jamu-prj,tttor/csipb-jamu-prj,tttor/csipb-jamu-prj,tttor/csipb-jamu-prj,tttor/csipb-jamu-prj,tttor/csipb-jamu-prj