get rid of piForeach

apply some code analyzer recommendations
ICU flag now check if libicu exists
prepare for more accurate growth of containers (limited PoT, then constantly increase size)

libs/main/io_devices/piserial.cpp

@@ -685,7 +685,7 @@ bool PISerial::openDevice() {
 	if (!pl.startsWith("/") && !pl.startsWith("com")) {
 		p.clear();
 		PIVector<DeviceInfo> devs = availableDevicesInfo();
-		piForeachC(DeviceInfo & d, devs) {
+		for (const auto & d: devs) {
 			if (d.id() == pl) {
 				p = d.path;
 				break;
@@ -1011,7 +1011,7 @@ PIPropertyStorage PISerial::constructVariantDevice() const {
 	PIVariantTypes::Enum e;
 
 	PIVector<int> as = availableSpeeds();
-	piForeachC(int s, as) {
+	for (const auto s: as) {
 		e << PIVariantTypes::Enumerator(s, PIString::fromNumber(s));
 	}
 	e.selectValue((int)inSpeed());
@@ -1073,7 +1073,7 @@ PIVector<int> PISerial::availableSpeeds() {
 PIStringList PISerial::availableDevices(bool test) {
 	PIVector<DeviceInfo> devs = availableDevicesInfo(test);
 	PIStringList ret;
-	piForeachC(DeviceInfo & d, devs)
+	for (const auto & d: devs)
 		ret << d.path;
 	return ret;
 }
@@ -1232,8 +1232,8 @@ PIVector<PISerial::DeviceInfo> PISerial::availableDevicesInfo(bool test) {
 #	ifdef LINUX
 	char linkbuf[1024];
 #	endif
-	piForeachC(PIFile::FileInfo & e, de) { // TODO changes in FileInfo
-		piForeachC(PIString & p, prefixes) {
+	for (const auto & e: de) { // TODO changes in FileInfo
+		for (const auto & p: prefixes) {
 			if (e.name().startsWith(p)) {
 				di          = DeviceInfo();
 				di.path     = e.path;