Better support for LCD 2004A 20x4

[tthk]

Have you looked for this feature in other issues and in the docs?
Yes

Is your feature request related to a problem? Please describe.
A clear and concise description of what the problem is.
LCD display support is currently on for 16x2 characters display. Please support 2004A I2C display, which is 20x4.

Describe the solution you'd like
A clear and concise description of what you want to happen.
Changes to remove 16x2 hardcoded display resolution and allow user to select 20x4.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.
LCD 2004 can be used, but because Tasmota initialized it as 16x2, the formatting is off.

Additional context
Add any other context or screenshots about the feature request here.
I've made a change in two files which allows 20x4 sized LCD. I am submitting a pull request and will reference this issue.
A feature request for this exact issue was closed a while back:
#669

(Please, remember to close the issue when the problem has been addressed)

[ascillato2]

Closing as the thread continues in #8064