Tweak mf helper scripts

buildroot/bin/mftest

   -a --autobuild   PIO Build using the MOTHERBOARD environment.
   -u --autoupload  PIO Upload using the MOTHERBOARD environment.
   -v --verbose     Extra output for debugging.
+  -s --silent      Silence build output from PlatformIO.
 
 env shortcuts: tree due esp lin lpc|lpc8 lpc9 m128 m256|mega stm|f1 f4 f7 s6 teensy|t31|t32 t35|t36 t40|t41
 "
        esac
        ;;
     r) REBUILD=1         ; bugout "Rebuilding previous..." ;;
+    s) SILENT_FLAG="-s" ;;
     t) TESTENV="$OPTARG" ; bugout "Got a target: $TESTENV" ;;
     u) AUTO_BUILD=2      ; bugout "Auto-Upload target..." ;;
     v) DEBUG=1           ; bugout "Debug ON" ;;
   # Build with the last-built env
   [[ -f "$STATE_FILE" ]] || { errout "No previous (-r) build state found." ; exit 1 ; }
   read TESTENV <"$STATE_FILE"
-  pio run -s -d . -e $TESTENV
-  exit
+  pio run $SILENT_FLAG -d . -e $TESTENV
+  exit 0
 fi
 
 case $TESTENV in
 
   if ((AUTO_BUILD == 2)); then
     echo "Uploading environment $TARGET for board $MB ($BNUM)..." ; echo
-    pio run -t upload -e $TARGET
+    pio run $SILENT_FLAG -t upload -e $TARGET
   else
     echo "Building environment $TARGET for board $MB ($BNUM)..." ; echo
-    pio run -s -e $TARGET
+    pio run $SILENT_FLAG -e $TARGET
   fi
-  exit
+  exit 0
 fi
 
 #
 
 [[ $BUILD_YES == 'Y' || $BUILD_YES == 'Yes' ]] && {
   ((USE_MAKE)) && make tests-single-local TEST_TARGET=$TESTENV ONLY_TEST=$CHOICE
-  ((USE_MAKE)) || pio run -s -d . -e $TESTENV
+  ((USE_MAKE)) || pio run $SILENT_FLAG -d . -e $TESTENV
   echo "$TESTENV" >"$STATE_FILE"
 }

buildroot/share/git/mfqp

 #
 #  - git add .
 #  - git commit --amend
-#  - ghpc
+#  - git push -f
 #
 
 MFINFO=$(mfinfo "$@") || exit 1
 while [ $IND -lt ${#INFO[@]} ]; do
   ARG=${INFO[$IND]}
   case "$ARG" in
+    -f|--force ) FORCE=1 ;;
      -h|--help ) USAGE=1 ;;
              * ) USAGE=1 ; echo "unknown option: $ARG" ;;
   esac
 
 [[ $USAGE == 1 ]] && { echo "usage: `basename $0` [1|2|3]" 1>&2 ; exit 1 ; }
 
-[[ $CURR == $TARG && $REPO != "MarlinDocumentation" ]] && { echo "Don't alter the PR Target branch."; exit 1 ; }
+[[ $FORCE != 1 && $CURR == $TARG && $REPO != "MarlinDocumentation" ]] && { echo "Don't alter the PR Target branch."; exit 1 ; }
 
 git add . && git commit --amend && git push -f