fix: unwanted space insertion in single line markdown text input when replacing selected text#718

jmusial merged 4 commits intoExpensify:mainExpensify/react-native-live-markdown:mainfrom

TaduJR:fix-unwanted-space-insertion-in-single-line-MarkdownTextInput-when-replacing-selected-textTaduJR/react-native-live-markdown:fix-unwanted-space-insertion-in-single-line-MarkdownTextInput-when-replacing-selected-textCopy head branch name to clipboard