Add qalculate-gtk back and window rule for floating

hypr/conf/windowrules/default.conf

@@ -8,3 +8,4 @@ windowrule = tile,^(Chromium)$
 windowrule = float,^(pavucontrol)$
 windowrule = float,^(blueman-manager)$
 windowrule = float,^(nm-connection-editor)$
+windowrule = float,^(qalculate-gtk)$