Graph in temp panel, combine preheat and temp (#393)

* Graph in temp panel, combine preheat and temp

* Fix target not working properly

* Fix initial preselect

* Add the ability to change in delta temps

* Make the label translatable

* Add Unit to the label

* Add de/select button to popover

* Warn the user if nothing was selected

* Fix templabel

* Fix to comply with pep8

* Fix colors, thanks Jordan

* Fix popover selection

* Update docs image

* Gain horizontal space

* Gain even more horizontal space (remove target)

* Fix temperature_fan

* Add icon and style to temperature_fan

* List preheat deprecation in breaking changes

* Use the printer maximum temperature

* Cleanup target and fix popover select

* Fix codestyle

* Add extra preheat presets

* Change Class name

* Update docs image

* Improve Maximum temperature handling and Temperature fans

ks_includes/defaults.conf

@@ -10,6 +10,14 @@ extruder = 195
 bed = 90
 extruder = 220
 
+[preheat PETG]
+bed = 80
+extruder = 240
+
+[preheat FLEX]
+bed = 0
+extruder = 210
+
 [menu __main]
 name: {{ gettext('Main Menu') }}
 
@@ -17,10 +25,10 @@ name: {{ gettext('Main Menu') }}
 name: {{ gettext('Homing') }}
 icon: home
 
-[menu __main preheat]
-name: {{ gettext('Preheat') }}
+[menu __main temperature]
+name: {{ gettext('Temperature') }}
 icon: heat-up
-panel: preheat
+panel: temperature
 
 [menu __main actions]
 name: {{ gettext('Actions') }}
@@ -95,11 +103,6 @@ name: {{ gettext('Fan') }}
 icon: fan
 panel: fan
 
-[menu __main actions temperature]
-name: {{ gettext('Temperature') }}
-icon: heat-up
-panel: temperature
-
 [menu __main actions macros]
 name: {{ gettext('Macros') }}
 icon: custom-script