logic: added all previous java version to Java language standard selection

src/lib/data/indexer/interprocess/shared_types/SharedIndexerCommand.cpp

@@ -39,6 +39,7 @@ void SharedIndexerCommand::fromLocal(IndexerCommand* indexerCommand)
 		IndexerCommandJava* cmd = dynamic_cast<IndexerCommandJava*>(indexerCommand);
 
 		setType(JAVA);
+		setLanguageStandard(cmd->getLanguageStandard());
 		setClassPaths(cmd->getClassPath());
 	}
 	else
@@ -85,6 +86,7 @@ std::shared_ptr<IndexerCommand> SharedIndexerCommand::fromShared(const SharedInd
 			indexerCommand.getSourceFilePath(),
 			indexerCommand.getIndexedPaths(),
 			indexerCommand.getExcludedPaths(),
+			indexerCommand.getLanguageStandard(),
 			indexerCommand.getClassPaths()
 		);
 	}

src/lib/settings/SourceGroupSettingsJava.cpp

@@ -47,7 +47,7 @@ bool SourceGroupSettingsJava::equals(std::shared_ptr<SourceGroupSettings> other)
 
 std::vector<std::string> SourceGroupSettingsJava::getAvailableLanguageStandards() const
 {
-	return std::vector<std::string>(1, "8");
+	return std::vector<std::string>{"1", "2", "3", "4", "5", "6", "7", "8"};
 }
 
 bool SourceGroupSettingsJava::getUseJreSystemLibrary() const