Simple Weather Service - code cleaning and improvements

Rename Symbols::cloud_meatball to Symbols::cloudMeatball.

Author: JF002

src/displayapp/screens/Symbols.h

@@ -45,7 +45,7 @@ namespace Pinetime {
         static constexpr const char* cloudShowersHeavy = "\xEF\x9D\x80";
         static constexpr const char* smog = "\xEF\x9D\x9F";
         static constexpr const char* cloud = "\xEF\x83\x82";
-        static constexpr const char* cloud_meatball = "\xEF\x9C\xBB";
+        static constexpr const char* cloudMeatball = "\xEF\x9C\xBB";
         static constexpr const char* bolt = "\xEF\x83\xA7";
         static constexpr const char* snowflake = "\xEF\x8B\x9C";
         static constexpr const char* ban = "\xEF\x81\x9E";

src/displayapp/screens/WatchFacePineTimeStyle.cpp

@@ -55,7 +55,7 @@ namespace {
         return Symbols::cloud;
         break;
       case Pinetime::Controllers::SimpleWeatherService::Icons::BrokenClouds:
-        return Symbols::cloud_meatball;
+        return Symbols::cloudMeatball;
         break;
       case Pinetime::Controllers::SimpleWeatherService::Icons::Thunderstorm:
         return Symbols::bolt;