Update PULL_REQUEST_TEMPLATE.md (#258)
Update PULL_REQUEST_TEMPLATE.md (#258)

Adds `Ran `make check-style` to check for style errors (required for all pull requests)` and fixes localization file location
rickbatka/mattermost-webapp,rickbatka/mattermost-webapp,rickbatka/mattermost-webapp,rickbatka/mattermost-webapp