resources: Add pencil icon

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

qgcresources.qrc

@@ -33,6 +33,7 @@
         <file alias="notile.png">resources/notile.png</file>
         <file alias="Pause.svg">resources/Pause.svg</file>
         <file alias="pause-mission.svg">resources/pause-mission.svg</file>
+        <file alias="pencil.svg">resources/pencil.svg</file>
         <file alias="Play">resources/Play.svg</file>
         <file alias="PowerButton">resources/PowerButton.svg</file>
         <file alias="QGCLogoBlack">resources/QGCLogoBlack.svg</file>

resources/pencil.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24"><path fill="none" d="M0 0h24v24H0z"/><path d="M12.9 6.858l4.242 4.243L7.242 21H3v-4.243l9.9-9.9zm1.414-1.414l2.121-2.122a1 1 0 0 1 1.414 0l2.829 2.829a1 1 0 0 1 0 1.414l-2.122 2.121-4.242-4.242z"/></svg>