fix(gui): exclusion disablement should be exact package match (PR #500)

jadx-gui/src/main/java/jadx/gui/JadxWrapper.java

@@ -88,7 +88,8 @@ public class JadxWrapper {
 
 		return classList.stream().filter(cls -> {
 			for (String exclude : excludedPackages) {
-				if (cls.getFullName().startsWith(exclude)) {
+				if (cls.getFullName().equals(exclude)
+						|| cls.getFullName().startsWith(exclude + '.')) {
 					return false;
 				}
 			}
@@ -98,11 +99,15 @@ public class JadxWrapper {
 
 	public List<String> getExcludedPackages() {
 		String excludedPackages = settings.getExcludedPackages().trim();
+		if (excludedPackages.isEmpty()) {
+			return Collections.emptyList();
+		}
 		return Arrays.asList(excludedPackages.split("[ ]+"));
 	}
 
 	public void addExcludedPackage(String packageToExclude) {
-		settings.setExcludedPackages(settings.getExcludedPackages() + ' ' + packageToExclude);
+		String newExclusion = settings.getExcludedPackages() + ' ' + packageToExclude;
+		settings.setExcludedPackages(newExclusion.trim());
 		settings.sync();
 	}
 

jadx-gui/src/main/java/jadx/gui/treemodel/JPackage.java

@@ -46,7 +46,8 @@ public class JPackage extends JNode implements Comparable<JPackage> {
 	private void setEnabled(JadxWrapper wrapper) {
 		List<String> excludedPackages = wrapper.getExcludedPackages();
 		this.enabled = excludedPackages.isEmpty()
-				|| excludedPackages.stream().filter(p -> !p.isEmpty()).noneMatch(p -> name.startsWith(p));
+				|| excludedPackages.stream().filter(p -> !p.isEmpty())
+					.noneMatch(p -> name.equals(p) || name.startsWith(p + '.'));
 	}
 
 	public final void update() {