Fix scheme handler not passing arguments

resources/nheko.desktop

@@ -2,7 +2,7 @@
 Name=nheko
 Version=1.0
 Comment=Desktop client for Matrix
-Exec=nheko
+Exec=nheko %u
 Icon=nheko
 Type=Application
 Categories=Network;InstantMessaging;Qt;

src/main.cpp

@@ -128,7 +128,7 @@ main(int argc, char *argv[])
         // parsed before the SingleApplication userdata is set.
         QString userdata{""};
         QString matrixUri;
-        for (int i = 0; i < argc; ++i) {
+        for (int i = 1; i < argc; ++i) {
                 QString arg{argv[i]};
                 if (arg.startsWith("--profile=")) {
                         arg.remove("--profile=");