Webui small fixes (#3713)

esphome/components/climate/climate_traits.cpp

@@ -1,19 +1,10 @@
 #include "climate_traits.h"
-#include <cstdio>
 
 namespace esphome {
 namespace climate {
 
 int8_t ClimateTraits::get_temperature_accuracy_decimals() const {
-  // use printf %g to find number of digits based on temperature step
-  char buf[32];
-  sprintf(buf, "%.5g", this->visual_temperature_step_);
-  std::string str{buf};
-  size_t dot_pos = str.find('.');
-  if (dot_pos == std::string::npos)
-    return 0;
-
-  return str.length() - dot_pos - 1;
+  return step_to_accuracy_decimals(this->visual_temperature_step_);
 }
 
 }  // namespace climate