Incorporate shared memory in bar text

Shared memory is claimed, and as significant a part of the memory load
as the "used" memory. Since "shared" was separated from the "used"
value, the basic "used/total" display in the bar text has become less
meaningful for Linux, as it only reflects a subset of the claimed
memory. The difference often isn't huge, but it can become so if tmpfs
is heavily used.

Improve the situation by adding used and shared for that text,
making it "claimed/total".

Action.c

@@ -697,7 +697,7 @@ static Htop_Reaction actionHelp(State* st) {
    addbartext(CRT_colors[MEMORY_COMPRESSED], "/", "compressed");
    addbartext(CRT_colors[MEMORY_BUFFERS_TEXT], "/", "buffers");
    addbartext(CRT_colors[MEMORY_CACHE], "/", "cache");
-   addbartext(CRT_colors[BAR_SHADOW], "          ", "used");
+   addbartext(CRT_colors[BAR_SHADOW], "       ", "claimed");
    addbartext(CRT_colors[BAR_SHADOW], "/", "total");
    addattrstr(CRT_colors[BAR_BORDER], "]");
 

MemoryMeter.c

@@ -40,13 +40,16 @@ static void MemoryMeter_updateValues(Meter* this) {
       "MEMORY_METER_AVAILABLE is not the last item in MemoryMeterValues");
    this->curItems = MEMORY_METER_AVAILABLE;
 
-   /* we actually want to show "used + compressed" */
-   double used = this->values[MEMORY_METER_USED];
+   /* we actually want to show "used + shared + compressed" */
+   double claimed = this->values[MEMORY_METER_USED];
+   if (!isnan(this->values[MEMORY_METER_SHARED])) {
+      claimed += this->values[MEMORY_METER_SHARED];
+   }
    if (!isnan(this->values[MEMORY_METER_COMPRESSED])) {
-      used += this->values[MEMORY_METER_COMPRESSED];
+      claimed += this->values[MEMORY_METER_COMPRESSED];
    }
 
-   written = Meter_humanUnit(buffer, used, size);
+   written = Meter_humanUnit(buffer, claimed, size);
    METER_BUFFER_CHECK(buffer, size, written);
 
    METER_BUFFER_APPEND_CHR(buffer, size, '/');