Partition Wizard can be loaded dynamically

[s-hadinger]

Description:

A new button [Load Partition Wizard] allows to dynamically load from the Web the Partition Wizard without needing to download it first as a .tapp file.

When clicking on this button the first time, the partition_wizard.bec file is loaded into memory taking ~30KB of memory, and then acts like if the tapp file was present.

Code increase: 1300 bytes (whereas Partition Wizard is ~16KB)

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.2.7.4.9
• The code change is tested and works with Tasmota core ESP32 V.2.0.14
• I accept the CLA.

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

[s-hadinger]

Hmmm. If the partition wizard tapp file is already there, the button is displayed twice...

Edit: solved

[s-hadinger]

Let's try and get feedback