Fix SelectImportsDialog (#633)

This is instead of saving the user input didn't do anything,
because it was used the incorrect 'imports' not the user provided
'filters'.

Author: gzsombor

org.eclipse.jdt.debug.ui/ui/org/eclipse/jdt/internal/debug/ui/snippeteditor/SelectImportsDialog.java

@@ -59,7 +59,11 @@ public Filter[] getStoredFilters(boolean defaults) {
 
 			@Override
 			public void setStoredFilters(IPreferenceStore store, Filter[] filters) {
-				fEditor.setImports(imports);
+				String[] newImports = new String[filters.length];
+				for (int i = 0; i < filters.length; i++) {
+					newImports[i] = filters[i].getName();
+				}
+				fEditor.setImports(newImports);
 			}
 
 		},