add toolbar icons to resource bundle

Author: PhilippSalvisberg

sqldev/src/main/resources/org/utplsql/sqldev/resources/UtplsqlResources.properties

@@ -14,6 +14,9 @@ FAILURE_ICON=/org/utplsql/sqldev/resources/images/failure.png
 DISABLED_ICON=/org/utplsql/sqldev/resources/images/disabled.png
 WARNING_ICON=/org/utplsql/sqldev/resources/images/warning.png
 INFO_ICON=/org/utplsql/sqldev/resources/images/info.png
+REFRESH_ICON=/org/utplsql/sqldev/resources/images/refresh.png
+RUN_ICON=/org/utplsql/sqldev/resources/images/run.png
+RUN_WORKSHEET_ICON=/org/utplsql/sqldev/resources/images/run_worksheet.png
 
 # Translatable text
 PREF_LABEL=utPLSQL