Port xconfig to Qt5 - Add(back) lineedit editing.

Signed-off-by: NBoris Barbulovski <bbarbulovski@gmail.com>
Signed-off-by: NThiago Macieira <thiago.macieira@intel.com>
Signed-off-by: NMichal Marek <mmarek@suse.com>

scripts/kconfig/qconf.cc

@@ -518,6 +518,7 @@ void ConfigList::changeValue(ConfigItem* item)
 	case S_INT:
 	case S_HEX:
 	case S_STRING:
+		parent()->lineEdit->show(item);
 		break;
 	}
 }