#65 Delayed display of custom tray icons during start

When starting checkgmail we first see the default tray icons until they get replaced with the custom ones.

This is because preferences aren't read before setting the icons.

For a quick hack to know what I'm talking about replace the set_icons()-call in the Icon section with

read_translations();
read_prefs();

You now shouldn't see the default icons anymore.

To fix this properly you maybe need to reorder the code a bit.