Preserve case of first letter in spell check, fixes #562
Preserve case of first letter in spell check, fixes #562

yuya-oc/electron-mattermost,yuya-oc/desktop,yuya-oc/desktop,mattermost/desktop,yuya-oc/electron-mattermost,mattermost/desktop,yuya-oc/desktop,yuya-oc/electron-mattermost,mattermost/desktop,mattermost/desktop,mattermost/desktop