D25320: Show startup error in popup as well

[Kai Uwe Broulik]

broulik created this revision.
broulik added reviewers: Plasma, fvogt.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
broulik requested review of this revision.

REVISION SUMMARY
  When the host crashes, the error message is shown to the user. When startup fails, only a generic message is shown.
  This adds the error message provided by the browser to aid debugging the problem.

TEST PLAN
  - Sabotaged my browser host, got the icon crossed-out, got "native host not found" in the popup. There was no badge because the icon is crossed out already and the error never cleared
  - Fixed my host, got normal plasma icon with generic popup icon (no behavior change)
  - Killed my host, got a "!" badge with the error which was cleared when the popup was closed (no behavior change)
  
  F7764821: Screenshot_20191115_112629.png <https://phabricator.kde.org/F7764821>

REPOSITORY
  R856 Plasma Browser Integration

REVISION DETAIL
  https://phabricator.kde.org/D25320

AFFECTED FILES
  extension/action_popup.html
  extension/action_popup.js
  extension/extension.js

To: broulik, #plasma, fvogt
Cc: plasma-devel, LeGast00n, The-Feren-OS-Dev, jraleigh, fbampaloukas, GB_2, ragreen, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
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