FlotKeySettingsComponent: axisMin, axisMax allow negative values

ui-ngx/src/app/modules/home/components/widget/lib/settings/chart/flot-key-settings.component.html

@@ -150,13 +150,13 @@
     <div class="tb-form-row space-between">
       <div translate>widgets.chart.min-scale-value</div>
       <mat-form-field appearance="outline" class="number" subscriptSizing="dynamic">
-        <input matInput formControlName="axisMin" type="number" min="0" placeholder="{{ 'widget-config.set' | translate }}">
+        <input matInput formControlName="axisMin" type="number" placeholder="{{ 'widget-config.set' | translate }}">
       </mat-form-field>
     </div>
     <div class="tb-form-row space-between">
       <div translate>widgets.chart.max-scale-value</div>
       <mat-form-field appearance="outline" class="number" subscriptSizing="dynamic">
-        <input matInput formControlName="axisMax" type="number" min="0" placeholder="{{ 'widget-config.set' | translate }}">
+        <input matInput formControlName="axisMax" type="number" placeholder="{{ 'widget-config.set' | translate }}">
       </mat-form-field>
     </div>
     <div class="tb-form-row space-between">