Fix FTBS of nm-tray

Summary:
  * Add missing include for used class
  * Remove unnecessary dependency on libkf5networkmanagerqt-dev

Test Plan:
1. Check that the build does not fail.
           2. Check that it has the same behaviour as before.

Reviewers: wxl, tsimonq2, hmollercl

Differential Revision: https://phab.lubuntu.me/D48

debian/changelog

@@ -1,3 +1,10 @@
+nm-tray (0.4.3-0ubuntu2) eoan; urgency=medium
+
+  * Add missing include for used class
+  * Removed dependency on libkf5networkmanagerqt-dev (LP: #1816267)
+
+ -- apt-ghetto <apt-ghetto@lubuntu.me>  Thu, 03 Oct 2019 18:06:08 +0200
+
 nm-tray (0.4.3-0ubuntu1) eoan; urgency=medium
 
   * Bump version for new upstream release 0.4.3

debian/control

@@ -15,8 +15,7 @@ Vcs-Git: https://phab.lubuntu.me/source/nm-tray.git
 
 Package: nm-tray
 Architecture: any
-Depends: libkf5networkmanagerqt-dev (>= 5.36.0),
-         ${misc:Depends},
+Depends: ${misc:Depends},
          ${shlibs:Depends}
 Description: simple NetworkManager front end
  nm-tray is a simple NetworkManager front end with information icon residing

debian/patches/include_used_class.patch

@@ -0,0 +1,18 @@
+Description: Add missing include for used class
+Author: Palo Kisa <palo.kisa@gmail.com>
+Applied-Upstream: https://github.com/palinek/nm-tray/commit/4563dabee3cbee13bc9d23a4a5d0ddda1526b43f
+
+---
+ src/nmmodel.cpp | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/src/nmmodel.cpp
++++ b/src/nmmodel.cpp
+@@ -45,6 +45,7 @@ COPYRIGHT_HEADER*/
+ #include <NetworkManagerQt/ConnectionSettings>
+ #include <QDBusPendingCallWatcher>
+ #include <QInputDialog>
++#include <QMetaEnum>
+ 
+ namespace
+ {

debian/patches/series

@@ -1,2 +1,3 @@
 generalize-terminal-for-edits.patch
 blacklist-from-menu.patch
+include_used_class.patch