Strings "Increase Font Size" and "Decrease Font Size" ([Editor.java](https://github.com/arduino/Arduino/blob/ba04ed2f7fa7f1c2733eb77a784253cf58365e82/app/src/processing/app/Editor.java#L1378)) not exist in [`.po` files](https://github.com/arduino/Arduino/tree/master/arduino-core/src/processing/app/i18n) so they are can't be translated on [transifex](https://www.transifex.com/mbanzi/arduino-ide-15/). Looks like some script must be launched manually for updating `.po` files here and on IDE translation project.