Profile-bound custom commands now execute

Rather than starting ksession right away, PreprocessedTerminal now waits
for ApplicationSettings to finish loading custom command settings from
storage. If a custom command is specified, PreprocessedTerminal will
tokenize it and pass it onto ksession as a shell program similar to the
-e option. If both a -e command and a custom command is specified, the
-e version overrides the custom command.

app/qml/ApplicationSettings.qml

@@ -97,6 +97,8 @@ QtObject{
 
     signal terminalFontChanged(string fontSource, int pixelSize, int lineSpacing, real screenScaling, real fontWidth)
 
+    signal initializedSettings()
+
     property Loader fontManager: Loader{
         states: [
             State { when: rasterization == no_rasterization
@@ -463,6 +465,8 @@ QtObject{
             fullscreen = true;
             showMenubar = false;
         }
+
+        initializedSettings();
     }
     Component.onDestruction: {
         storeSettings();