Revise inline keyword usage

And let compiler decide whether to inline functions.

src/base/profile.cpp

@@ -112,3 +112,8 @@ QString Profile::fromPortablePath(const QString &portablePath) const
 {
     return m_pathConverterImpl->fromPortablePath(portablePath);
 }
+
+QString specialFolderLocation(const SpecialFolder folder)
+{
+    return Profile::instance().location(folder);
+}

src/base/profile.h

@@ -83,9 +83,6 @@ private:
     static Profile *m_instance;
 };
 
-inline QString specialFolderLocation(SpecialFolder folder)
-{
-    return Profile::instance().location(folder);
-}
+QString specialFolderLocation(SpecialFolder folder);
 
 #endif // QBT_PROFILE_H

src/webui/webapplication.cpp

@@ -88,7 +88,7 @@ namespace
         return ret;
     }
 
-    inline QUrl urlFromHostHeader(const QString &hostHeader)
+    QUrl urlFromHostHeader(const QString &hostHeader)
     {
         if (!hostHeader.contains(QLatin1String("://")))
             return {QLatin1String("http://") + hostHeader};