map 'ISO_Level5_Shift' by default to the Mod3 modifier through <MDSW>

Assign the ISO_Level5_Shift symbol to the <MDSW> key and map this key
to the Mod3 modifier, so that, when the `action` part of an `interpret`
rule for ISO_Level5_Shift wants to set a virtual modifier (LevelFive,
normally), it will actually set Mod3.

This new default arrangement makes the fifth-level choosers (the <RALT>
and <LSGT> keys) work for the Neo layout (and its derivatives) also when
this layout is not the first group.

The <MDSW> key can be repurposed because "Mode switching" works fine
without having the symbol 'Mode_switch' attached to some modifier:
the `action` part of the relevant `interpret` rule simply increases
the group number with 1, and that is enough, no need to also set Mod5.

This fixes issue #322.

Signed-off-by: Benno Schulenberg <bensberg@telfort.nl>

1 files changed, 4 insertions, 2 deletions

diff --git a/symbols/pc b/symbols/pc
index 26334f2..65c8ef6 100644
--- a/symbols/pc
+++ b/symbols/pc
@@ -35,8 +35,10 @@ xkb_symbols "pc105" {
 
     // Six fake keys for virtual<->real modifiers mapping:
     key <LVL3> {[  ISO_Level3_Shift  ]};
-    key <MDSW> {[  Mode_switch  ]};
-    modifier_map Mod5  { <LVL3>, <MDSW> };
+    modifier_map Mod5  { <LVL3> };
+
+    key <MDSW> {[  ISO_Level5_Shift  ]};
+    modifier_map Mod3  { <MDSW> };
 
     key  <ALT> {[  NoSymbol, Alt_L  ]};
     modifier_map Mod1  { <ALT> };