HASPmota dropdown_list and fixes

[s-hadinger]

Description:

HASPmota:

• added dropdown_list class for style control over the list sub-object of dropdown
• added fixed class as a container with fixed sizes/positions sub-objects
• added dropdown direction attribute

LVGL:

• added lv.list to compiled objects (it was indirectly linked via dropdown anyways)
• added logs about allocated buffers

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.6
• The code change is tested and works with Tasmota core ESP32 V.3.0.0
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass