Fix formatting so translation files actually compile

My guess is that the translation bureau didn't properly check its file format correctness.

Contributes to issue CURA-3028.

resources/i18n/de/cura.po

@@ -221,6 +221,7 @@ msgstr ""
 "        <p>Verwenden Sie bitte die nachstehenden Informationen, um einen "
 "Fehlerbericht an folgende URL zu senden: <a href=\"http://github.com/"
 "Ultimaker/Cura/issues\">http://github.com/Ultimaker/Cura/issues</a></p>\n"
+"    "
 
 #: /home/ruben/Projects/Cura/plugins/MachineSettingsAction/MachineSettingsAction.qml:129
 msgctxt "@label"

resources/i18n/es/cura.po

@@ -218,6 +218,7 @@ msgstr ""
 "        <p>Use la siguiente información para enviar un informe de error a <a "
 "href=\"http://github.com/Ultimaker/Cura/issues\">http://github.com/Ultimaker/"
 "Cura/issues</a></p>\n"
+"    "
 
 #: /home/ruben/Projects/Cura/plugins/MachineSettingsAction/MachineSettingsAction.qml:129
 msgctxt "@label"

resources/i18n/fi/cura.po

@@ -216,6 +216,7 @@ msgstr ""
 "        <p>Tee virheraportti alla olevien tietojen perusteella osoitteessa "
 "<a href=\"http://github.com/Ultimaker/Cura/issues\">http://github.com/"
 "Ultimaker/Cura/issues</a></p>\n"
+"    "
 
 #: /home/ruben/Projects/Cura/plugins/MachineSettingsAction/MachineSettingsAction.qml:129
 msgctxt "@label"

resources/i18n/nl/cura.po

@@ -219,6 +219,7 @@ msgstr ""
 "        <p>Gebruik de onderstaande informatie om een bugrapport te plaatsen "
 "op <a href=\"http://github.com/Ultimaker/Cura/issues\">http://github.com/"
 "Ultimaker/Cura/issues</a></p>\n"
+"    "
 
 #: /home/ruben/Projects/Cura/plugins/MachineSettingsAction/MachineSettingsAction.qml:129
 msgctxt "@label"

resources/i18n/tr/cura.po

@@ -210,6 +210,7 @@ msgstr ""
 "        <p>Bir hata raporu göndermek için aşağıdaki bilgileri kullanın: <a "
 "href=\"http://github.com/Ultimaker/Cura/issues\">http://github.com/Ultimaker/"
 "Cura/issues</a></p>\n"
+"    "
 
 #: /home/ruben/Projects/Cura/plugins/MachineSettingsAction/MachineSettingsAction.qml:129
 msgctxt "@label"