Correctly label pointing device as absolute, not relative

The input device actually reports absolute events, not relative.
Interestingly it worked before, probably because of
InitAbsoluteClassDeviceStruct, but some applications were confused about
mismatching mode.

Adjust also min/max values based on max resolution supported by the
qubes dummy driver.

Fixes QubesOS/qubes-issues#7316

Author: marmarek

xf86-input-mfndev/src/qubes.c

@@ -328,8 +328,8 @@ static void QubesInitAxesLabels(QubesDevicePtr pQubes, int natoms,
     const char **labels;
     int labels_len = 0;
 
-    labels = rel_labels;
-    labels_len = ArrayLength(rel_labels);
+    labels = abs_labels;
+    labels_len = ArrayLength(abs_labels);
 
     memset(atoms, 0, natoms * sizeof(Atom));
 
@@ -364,18 +364,18 @@ static int _qubes_init_axes(DeviceIntPtr device)
         return BadAlloc;
 
 #if GET_ABI_MAJOR(ABI_XINPUT_VERSION) < 12
-    pInfo->dev->valuator->mode = Relative;
+    pInfo->dev->valuator->mode = Absolute;
 #endif
 #if GET_ABI_MAJOR(ABI_XINPUT_VERSION) < 13
     if (!InitAbsoluteClassDeviceStruct(device))
         return BadAlloc;
 #endif
 
     for (i = 0; i < pQubes->axes; i++) {
-        xf86InitValuatorAxisStruct(device, i, *pQubes->labels, -1,
-                -1, 1, 1, 1
+        xf86InitValuatorAxisStruct(device, i, atoms[i], 0,
+                32767, 1, 1, 1
 #if GET_ABI_MAJOR(ABI_XINPUT_VERSION) >= 12
-                , Relative
+                , Absolute
 #endif
                 );
         xf86InitValuatorDefaults(device, i);