standardise modal footers

[bwp91]

these changes are already in alpha branch - part of the work to bring this into the beta.

---

• standardise all modal footers to:
  • always show a close button at the bottom
    • show the close button on the left when there is an 'action' button on the right
    • show the close button in the middle when there is no action button
    • all close buttons say 'Close' now rather than varying between close and cancel
• for varied references of 'Dismiss' and 'Cross click', update all to say 'Dismiss'
• added missing openFullConfigEditor() function to bridge-plugins-modal.component.ts
• added new button labels to translation files:
  • form.button_disable
  • form.button_lock
  • form.button_more_info
  • form.button_remove
  • form.button_reset
  • form.button_unlock
• updated dependencies