Display error when OpenConnect was not found (#81)

GPService/gpservice.cpp

@@ -99,7 +99,8 @@ void GPService::connect(QString server, QString username, QString passwd, QStrin
 
     QString bin = findBinary();
     if (bin == nullptr) {
-        log("Could not found openconnect binary, make sure openconnect is installed, exiting.");
+        log("Could not find openconnect binary, make sure openconnect is installed, exiting.");
+        emit error("The OpenConect CLI was not found, make sure it has been installed!");
         return;
     }
 

GPService/gpservice.h

@@ -31,6 +31,7 @@ public:
 signals:
     void connected();
     void disconnected();
+    void error(QString errorMessage);
     void logAvailable(QString log);
 
 public slots:

GPService/gpservice.xml

@@ -8,6 +8,9 @@
     <signal name="logAvailable">
       <arg name="log" type="s" />
     </signal>
+    <signal name="error">
+      <arg name="errorMessage" type="s" />
+    </signal>
     <method name="connect">
       <arg name="server" type="s" direction="in"/>
       <arg name="username" type="s" direction="in"/>