Fix expression editor completion for multi-value properties#658

pasindufernando1 wants to merge 2 commits intoballerina-platform:1.5.xballerina-platform/ballerina-language-server:1.5.xfrom

pasindufernando1:2307Fixpasindufernando1/ballerina-language-server:2307FixCopy head branch name to clipboard