replaced one structure, stored omemo support in Global object

shared/global.cpp

@@ -20,6 +20,11 @@
 
 #include "enums.h"
 #include "ui/models/roster.h"
+#ifdef WITH_OMEMO
+constexpr bool OMEMO_SUPPORT = true;
+#else
+constexpr bool OMEMO_SUPPORT = false
+#endif
 
 Shared::Global* Shared::Global::instance = 0;
 const std::set<QString> Shared::Global::supportedImagesExts = {"png", "jpg", "webp", "jpeg", "gif", "svg"};
@@ -96,6 +101,7 @@ Shared::Global::Global():
     }),
     defaultSystemStyle(QApplication::style()->objectName()),
     defaultSystemPalette(QApplication::palette()),
+    omemoSupport(OMEMO_SUPPORT),
     pluginSupport({
         {"KWallet", false},
         {"openFileManagerWindowJob", false},

shared/global.h

@@ -99,6 +99,7 @@ namespace Shared {
         static QString getColorSchemeName(const QString& path);
         static void setTheme(const QString& path);
         static void setStyle(const QString& style);
+        const bool omemoSupport;
         
         template<typename T>
         static T fromInt(int src);