round af/rx-/txdelay to 3 decimal places

This avoids seeing 0.1999999 for direct.txdelay 0.2 :)

src/helpers/CommonCLI.cpp

@@ -773,7 +773,7 @@ void CommonCLI::handleGetCmd(uint32_t sender_timestamp, char* command, char* rep
     int dc_frac = (int)((dc - dc_int) * 10.0f + 0.5f);
     sprintf(reply, "> %d.%d%%", dc_int, dc_frac);
   } else if (memcmp(config, "af", 2) == 0) {
-    sprintf(reply, "> %s", StrHelper::ftoa(_prefs->airtime_factor));
+    sprintf(reply, "> %s", StrHelper::ftoa3(_prefs->airtime_factor));
   } else if (memcmp(config, "int.thresh", 10) == 0) {
     sprintf(reply, "> %d", (uint32_t) _prefs->interference_threshold);
   } else if (memcmp(config, "agc.reset.interval", 18) == 0) {
@@ -811,9 +811,9 @@ void CommonCLI::handleGetCmd(uint32_t sender_timestamp, char* command, char* rep
     strcpy(bw, StrHelper::ftoa3(_prefs->bw));
     sprintf(reply, "> %s,%s,%d,%d", freq, bw, (uint32_t)_prefs->sf, (uint32_t)_prefs->cr);
   } else if (memcmp(config, "rxdelay", 7) == 0) {
-    sprintf(reply, "> %s", StrHelper::ftoa(_prefs->rx_delay_base));
+    sprintf(reply, "> %s", StrHelper::ftoa3(_prefs->rx_delay_base));
   } else if (memcmp(config, "txdelay", 7) == 0) {
-    sprintf(reply, "> %s", StrHelper::ftoa(_prefs->tx_delay_factor));
+    sprintf(reply, "> %s", StrHelper::ftoa3(_prefs->tx_delay_factor));
   } else if (memcmp(config, "flood.max.advert", 16) == 0) {
     sprintf(reply, "> %d", (uint32_t)_prefs->flood_max_advert);
   } else if (memcmp(config, "flood.max.unscoped", 18) == 0) {
@@ -821,7 +821,7 @@ void CommonCLI::handleGetCmd(uint32_t sender_timestamp, char* command, char* rep
   } else if (memcmp(config, "flood.max", 9) == 0) {
     sprintf(reply, "> %d", (uint32_t)_prefs->flood_max);
   } else if (memcmp(config, "direct.txdelay", 14) == 0) {
-    sprintf(reply, "> %s", StrHelper::ftoa(_prefs->direct_tx_delay_factor));
+    sprintf(reply, "> %s", StrHelper::ftoa3(_prefs->direct_tx_delay_factor));
   } else if (memcmp(config, "owner.info", 10) == 0) {
     auto start = reply;
     *reply++ = '>';