add icons to the instance menu and 4 new icons:

delete
rename
tag
export

Signed-off-by: leo78913 <leo3758@riseup.net>

launcher/resources/flat/scalable/rename.svg

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   fill="#757575"
+   height="24"
+   viewBox="0 0 24 24"
+   width="24"
+   version="1.1"
+   id="svg4"
+   xml:space="preserve"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg"><defs
+   id="defs6" />
+  
+<path
+   id="rect345"
+   style="stroke-width:1.40001;stroke-linecap:square"
+   d="m 16.944458,1.2305698 -2.249239,2.2492384 5.824973,5.8249729 2.249239,-2.2492385 a 0.74206194,0.74206194 90.000002 0 0 0,-1.0494341 L 17.993892,1.2305699 a 0.74206211,0.74206211 2.5523302e-6 0 0 -1.049434,-1e-7 z M 13.645389,4.5296385 3.5726925,14.602335 9.3976653,20.427306 19.470362,10.35461 Z M 2.5228612,15.652165 1.0244287,22.411695 a 0.47276304,0.47276304 44.999993 0 0 0.5638754,0.563875 l 6.75953,-1.498434 z" /></svg>