Fine-tune graphics after adding support for LIGHT/DARK

[ba58smith]

Here are the things that still need to be fixed to make the graphics all right.

• [x] Navigation view: the line between the bar and the top of the "Clock" tile is too thick.
• [ ] On all keyboard screens, there is a black bar at the top of the keyboard that shouldn't be there.
• [x] On Display Settings screen, the "Screen timeout" button is too high - it touched the top border.
• [x] The icon images on the Navigation view need to turn white in DARK mode.
• [x] When you change from LIGHT to DARK or vice versa, and then hit the Back button, all the images on the Navigation screen are the wrong color. (The Back button, and the icon for each tile.) (When you go all the way to the main screen, then come back in, they're correct.)
• [x] The "Signal K" tile's icon is a color image, so it should NOT change color when changing from LIGHT to DARK and vice versa.
• [x] Find a different icon to use for "Wakeup Settings" tile (now it's using the same as "Display Settings").
• [x] Make the font bigger on the tiles on the Watch Settings (also known as Navigation) screen.
• [x] Automatically set brightness level to 1 or 5 when changing to DARK or LIGHT.

[ba58smith]

According to https://docs.lvgl.io/latest/en/html/widgets/keyboard.html, that black bar on the keyboard, between the text area and the button matrix, is supposed to be there. (Has it always been there, though?)

[JohnySeven]

@ba58smith was checking it on my watch running pre themes version and there is black bar between keyboard and textbox. But in previous version the background was black, so maybe it wasn't that apparent in that time?

[ba58smith]

Oh, yeah. Looking back on my photos of the keyboard before I did anything with themes, there was a BIG black bar separating the text area from the keys. The question is, @JohnySeven, would you like me to try to eliminate it?

[JohnySeven]

I'm OK with black bar on the keyboard for now. Let's close it for now.