graphics: use premade 68px M_PAUSE. (#1160)

Closes #1153.

buildcfg.txt

@@ -786,7 +786,7 @@ M_THERMR	0	0
 M_THERMM	0	0
 M_THERML	-2	0
 M_ENDGAM	0	1
-M_PAUSE	0	0
+M_PAUSE	0	0	= pause
 M_MESSG	0	1
 M_MSGON		20	1
 M_MSGOFF	20	1

graphics/text/Makefile

@@ -1,12 +1,13 @@
 # textgen outputs these files which are included in the built WADs
 # as lumps.
+# m_pause.png is intentionally omitted.
 TEXTGEN_GRAPHIC_LUMPS = \
   m_detail.png m_disopt.png m_disp.png   m_endgam.png m_epi1.png   \
   m_epi2.png   m_epi3.png   m_epi4.png   m_episod.png m_gdhigh.png \
   m_gdlow.png  m_hurt.png   m_jkill.png  m_lgttl.png  m_loadg.png  \
   m_messg.png  m_msens.png  m_msgoff.png m_msgon.png  m_musvol.png \
   m_newg.png   m_ngame.png  m_nmare.png  m_option.png m_optttl.png \
-  m_pause.png  m_quitg.png  m_rdthis.png m_rough.png  m_saveg.png  \
+  m_quitg.png  m_rdthis.png m_rough.png  m_saveg.png  \
   m_scrnsz.png m_sfxvol.png m_sgttl.png  m_skill.png  m_svol.png   \
   m_about.png  m_accel.png  m_auto.png   m_chat.png   m_chatm.png  \
   m_compat.png m_demos.png  m_dmflag.png m_enem.png   m_etcopt.png \

graphics/text/config.py

@@ -158,7 +158,7 @@ red_graphics = {
     "wipcnt": "%",
     "wiminus": "-",
     "wienter": "ENTERING",
-    "m_pause": "pause",
+#    "m_pause": "pause",  # Doom is hard-coded to assume M_PAUSE is 68px, FD's font makes it 52
     # Extra graphics used in PrBoom's menus. Generate these as well
     # so that when we play in PrBoom the menus look consistent.
     "prboom": "PrBoom",