use platform-neutral system include

Merge pull request rstudio#4479 from rstudio/bugfix/exception-find-in…

…-files

Fix javascript exception triggered by showing Find in Files dialog

Merge pull request rstudio#4401 from rstudio/bugfix/launcherjobtab-ex…

…ception

fix javascript exception at startup by returning a valid widget

avoid nullptr

Merge pull request rstudio#3737 from rstudio/bugfix/rstudio-v11-macos…

…-locale

port locale fix to v1.1

Merge pull request rstudio#3730 from rstudio/bugfix/regex-replace-c++…

…98-compatible

use functor instead of lambda

use 'query' variable

use 'query' variable

remove unused include

work around strange R 3.5.1 encoding issue