[weather] add humidity to hourly view, fix spacing error when using UV Index, add config option to hide precipitation entries that are zero [Rebased Version of PR #3526] (#3748)

Fixed Version of PR #3526 since that was against the wrong branch and
had issues.

Original PR Text: 
Basically the title. Just some existing weather data included into
hourly, some config option ("hideZeroes") to hide precipitation when it
is zero (this actually shrinks the entire table, removing columns that
are completely empty), and add a spacing column to fix the UV Index
column.

---------

Co-authored-by: Veeck <github@veeck.de>

modules/default/weather/hourly.njk

@@ -21,15 +21,25 @@
                         {% endif %}
                     </td>
                 {% endif %}
+                {% if config.showHumidity != "none" %}
+                  <td class="align-left bright humidity-hourly">
+                          {{ hour.humidity }}
+                          <span class="wi wi-humidity humidity-icon"></span>
+                  </td>
+                {% endif %}
                 {% if config.showPrecipitationAmount %}
-                    <td class="align-right bright precipitation-amount">
-                        {{ hour.precipitationAmount | unit("precip", hour.precipitationUnits) }}
-                    </td>
+                  {% if (not config.hideZeroes or hour.precipitationAmount>0) %}
+                      <td class="align-right bright precipitation-amount">
+                          {{ hour.precipitationAmount | unit("precip", hour.precipitationUnits) }}
+                      </td>
+                  {% endif %}
                 {% endif %}
                 {% if config.showPrecipitationProbability %}
+                  {% if (not config.hideZeroes or hour.precipitationAmount>0) %}
                     <td class="align-right bright precipitation-prob">
-                        {{ hour.precipitationProbability | unit('precip', '%') }}
+                      {{ hour.precipitationProbability | unit('precip', '%') }}
                     </td>
+                  {% endif %}
                 {% endif %}
             </tr>
             {% set currentStep = currentStep + 1 %}

modules/default/weather/weather.css

@@ -31,6 +31,7 @@
 
 .weather .precipitation-amount,
 .weather .precipitation-prob,
+.weather .humidity-hourly,
 .weather .uv-index {
   padding-left: 20px;
   padding-right: 0;

modules/default/weather/weather.js

@@ -14,7 +14,8 @@ Module.register("weather", {
 		updateInterval: 10 * 60 * 1000, // every 10 minutes
 		animationSpeed: 1000,
 		showFeelsLike: true,
-		showHumidity: "none", // this is now a string; see current.njk
+		showHumidity: "none", // possible options for "current" weather are "none", "wind", "temp", "feelslike" or "below", for "hourly" weather "none" or "true"
+		hideZeroes: false, // hide zeroes (and empty columns) in hourly, currently only for precipitation
 		showIndoorHumidity: false,
 		showIndoorTemperature: false,
 		allowOverrideNotification: false,