feat(webui): Automatic ROI naming + ROI/Alignment marker position validation

[Slider0007]

1. feat(webui): Automatic ROI naming

• The ROI names for digit and analog ROIs are automatically and uniquely generated: e.g. dig1, dig2, ... | ana1, ana2, ...
  • No user-defined names anymore to avoid issues like wrong ROI image presentation on 'Recognition Details' page whenever identical ROI names are used multiple times in one number sequence (digit ROI image with same name than analog ROI is shown between analog ROIs)
  • Avoid confusion in terms of ROI value which is independent from ROI name but only from ROI position in drop-down
  • ROI name is not relevant for other purposees, only for user feedback
• It is ensured that names are always in ascending order without any naming gap between even ROI are deleted between existing ones.

2. feat(webui): ROI & Alignment marker basic position validation

• ROI & Alignment marker coordinates are checked against the image size (width & height) to ensure that ROI / Alignment Marker is not out of image area (check implemented on HTML + firmware level)
• Detecting one or more ROIs out of image area firmware is aborting intialization step (+ error message in log) to prevent against processing without valid values.

3. feat(webui): Aligment marker histogram

• Add a histogram of alignment marker image to eventually provide some support to find marker area with proper contrast.
  

4. feat(webui): Reference image size validation

• The size of actual reference image gets validated against the configured size. If the size differs a warning message will be displayed to indicate that a new reference image shall be taken.

5. feat(webui): Digit/Analog ROI: Add option to show only the selected ROI

• Ticking the new checkbox only selected ROI is shown on digit / analog ROI configuration page to have cleaner view to actual ROI (inspired from this feature request Button to hide other red Digit Frames for easier setup jomjol/AI-on-the-edge-device#2680)

6. refactor(webui): HTML / JS code cleanup, name and style harmonization