MapBox: Add Linguist comments

Add some comments helping translators to find the right wording.

Change-Id: Ie77f1020897b196668c03f472905bb47c6929d45
Reviewed-by: Michal Klocek <michal.klocek@qt.io>

src/plugins/geoservices/mapbox/qgeotiledmappingmanagerenginemapbox.cpp

@@ -62,19 +62,33 @@ QGeoTiledMappingManagerEngineMapbox::QGeoTiledMappingManagerEngineMapbox(const Q
     }
 
     // As of 2016.06.15, valid mapbox map_ids are documented at https://www.mapbox.com/api-documentation/#maps
+    //: Noun describing map type 'Street map'
     mapTypes << QGeoMapType(QGeoMapType::StreetMap, QStringLiteral("mapbox.streets"), tr("Street"), false, false, mapTypes.size());
+    //: Noun describing type of a map using light colors (weak contrast)
     mapTypes << QGeoMapType(QGeoMapType::StreetMap, QStringLiteral("mapbox.light"), tr("Light"), false, false, mapTypes.size());
+    //: Noun describing type of a map using dark colors
     mapTypes << QGeoMapType(QGeoMapType::StreetMap, QStringLiteral("mapbox.dark"), tr("Dark"), false, true, mapTypes.size());
+    //: Noun describing type of a map created by satellite
     mapTypes << QGeoMapType(QGeoMapType::SatelliteMapDay, QStringLiteral("mapbox.satellite"), tr("Satellite"), false, false, mapTypes.size());
+    //: Noun describing type of a street map created by satellite
     mapTypes << QGeoMapType(QGeoMapType::HybridMap, QStringLiteral("mapbox.streets-satellite"), tr("Streets Satellite"), false, false, mapTypes.size());
+    //: Noun describing type of a map using wheat paste colors
     mapTypes << QGeoMapType(QGeoMapType::CustomMap, QStringLiteral("mapbox.wheatpaste"), tr("Wheatpaste"), false, false, mapTypes.size());
+    //: Noun describing type of a basic street map
     mapTypes << QGeoMapType(QGeoMapType::StreetMap, QStringLiteral("mapbox.streets-basic"), tr("Streets Basic"), false, false, mapTypes.size());
+    //: Noun describing type of a map using cartoon-style fonts
     mapTypes << QGeoMapType(QGeoMapType::CustomMap, QStringLiteral("mapbox.comic"), tr("Comic"), false, false, mapTypes.size());
+    //: Noun describing type of a map for outdoor activities
     mapTypes << QGeoMapType(QGeoMapType::PedestrianMap, QStringLiteral("mapbox.outdoors"), tr("Outdoors"), false, false, mapTypes.size());
+    //: Noun describing type of a map for sports
     mapTypes << QGeoMapType(QGeoMapType::CycleMap, QStringLiteral("mapbox.run-bike-hike"), tr("Run Bike Hike"), false, false, mapTypes.size());
+    //: Noun describing type of a map drawn by pencil
     mapTypes << QGeoMapType(QGeoMapType::CustomMap, QStringLiteral("mapbox.pencil"), tr("Pencil"), false, false, mapTypes.size());
+    //: Noun describing type of a treasure map with pirate boat watermark
     mapTypes << QGeoMapType(QGeoMapType::CustomMap, QStringLiteral("mapbox.pirates"), tr("Pirates"), false, false, mapTypes.size());
+    //: Noun describing type of a map using emerald colors
     mapTypes << QGeoMapType(QGeoMapType::CustomMap, QStringLiteral("mapbox.emerald"), tr("Emerald"), false, false, mapTypes.size());
+    //: Noun describing type of a map with high contrast
     mapTypes << QGeoMapType(QGeoMapType::CustomMap, QStringLiteral("mapbox.high-contrast"), tr("High Contrast"), false, false, mapTypes.size());
 
     // New way to specify multiple customized map_ids via additional_map_ids