Write patch to remove terrible looking QT apps under ligthdm

We set the value to something more sane in other places, but it gets overriden

files/xsession.patch

@@ -0,0 +1,13 @@
+--- /etc/lightdm/Xsession	2019-03-13 18:14:42.569300975 +0000
++++ /etc/lightdm/Xsession	2019-05-13 08:52:58.876091847 +0100
+@@ -67,8 +67,8 @@
+ 
+ if ! [[ "${@}" =~ plasma|lxqt ]]; then
+     # Fix ugly styles for Qt applications when running under GTK-based desktops and Qt 5.7+
+-    export QT_QPA_PLATFORMTHEME='qt5ct'
+-    unset QT_STYLE_OVERRIDE
++    # export QT_QPA_PLATFORMTHEME='qt5ct'
++    # unset QT_STYLE_OVERRIDE
+ fi
+ 
+ echo "X session wrapper complete, running session $*"

tasks/i3.yml

@@ -94,3 +94,8 @@
     dest: /usr/bin/pranklock
     mode: 0755
     force: true
+
+- name: Patch out terrible looking QT
+  patch:
+    src: './files/xsession.patch'
+    dest: '/etc/lightdm/Xsession'