FEM: solver Z88, fix icon

src/Mod/Fem/femcommands/commands.py

@@ -744,7 +744,7 @@ class _SolverZ88(CommandManager):
 
     def __init__(self):
         super(_SolverZ88, self).__init__()
-        self.pixmap = "FEM_SolverZ88.ico"
+        self.pixmap = "FEM_SolverZ88.svg"
         self.menuetext = "Solver Z88"
         self.accel = "S, Z"
         self.tooltip = "Creates a FEM solver Z88"

src/Mod/Fem/femsolver/z88/solver.py

@@ -90,6 +90,6 @@ class Proxy(solverbase.Proxy):
 class ViewProxy(solverbase.ViewProxy):
 
     def getIcon(self):
-        return ":/icons/FEM_SolverZ88.ico"
+        return ":/icons/FEM_SolverZ88.svg"
 
 ##  @}