[ALOY-1112] Styles TSS: Support spaces in comma-separated lists of targets in the platform attribute

Improvement description

See ALOY-1090 Spaces in comma-separated lists of targets in the platform attribute could be supported also in styles .TSS. For example: 1. Create a new project and use the following code:

'#index[platform=android, ios]': {
	backgroundColor: 'yellow',
	fullscreen: false,
	exitOnClose: true
}

2. Run on android and ios. Result: In this case, no errors are displayed and the only the first target is (android) is currently recognized and styles applied. Expected result: Both target platforms should be recognized.