Frontend improvements.

[iberdinsky-skilld]

Closes #67

vars.yaml in root directory

plasmactl_web_ui_platform_name: 'Custom Platform Name'
plasmactl_web_ui_platform_favicon:
  '<svg width="300" height="130" xmlns="http://www.w3.org/2000/svg">
    <rect width="200" height="100" x="10" y="10" rx="20" ry="20" fill="blue" />
  </svg>'
plasmactl_web_ui_platform_logo:
  '<svg width="300" height="130" xmlns="http://www.w3.org/2000/svg">
    <rect width="200" height="100" x="10" y="10" rx="20" ry="20" fill="blue" />
  </svg>'

[davidferlay]

1. Platform name: ok // However let's change default value from Platform name to Platform
2. Tab name: could be defined in new var plasmactl_web_ui_platform_page_name
3. Header name: could be defined in new var plasmactl_web_ui_platform_header_name
4. Favicon: ok
5. Header logo: not ok although correct data is present in endpoint

Also, enpoint seem to be empty when plugin is compiled in new launchrctl binary with other plugins

[davidferlay]

• 4/5 solved in incognito window -> wrong usage for plasmactl_web_ui_platform_header_name
  

• Issue in relative/aboslute binary path:

  • ./plasmactlui web --foreground --swagger-ui > data ok
  • plasmactlui web --foreground --swagger-ui > data empty
    

[iberdinsky-skilld]

Moved backend issue relative/aboslute binary path to own ticket

#85