Notifications - fix UI performance with thousands of notifications

[himdel]

This (hopefully temporarily) moves notification area from patternfly to manageiq, and fixes it to have better performance characteristics with thousands of notifications...

WIP, now it actually uses our copy of the code, no other changes yet

• not render the notifications until the user actually expands the list (use ng-if instead of ng-show)
• limit the number of notifications we're retrieving from the server on load to as sane number (add ?limit=100 to the API request)
• limit the number of notifications we show in the list (for situations when we downloaded a 100, but then got another 3000 via websocket) - or use a infiniscroll component to do that

https://bugzilla.redhat.com/show_bug.cgi?id=1412172
(FINE: https://bugzilla.redhat.com/show_bug.cgi?id=1448045)
(EUWE: https://bugzilla.redhat.com/show_bug.cgi?id=1448046)

[himdel]

Adding a bunch of notifications on js side..

s = angular.element($0).scope();
for (var i = 0; i < 1024; i++) {
  s.notificationGroup.notifications.push({
    timeStamp: new Date(),
    data: {
      timeStamp: new Date(),
      endTime: new Date(),
      startTime: new Date(),
      message: "Foo!" + i,
    }
  });
}
s.$apply();

[himdel]

Less than a hundred items (no change):

More than a hundred - default:

More than a hundred - showing all

[miq-bot]

Checked commits https://github.com/himdel/manageiq-ui-classic/compare/e333d14893e924138a214dcca8adbe707d44ff54~...2b58e8f025a0b24ba3364e9fec24d2e97d94598f with ruby 2.2.6, rubocop 0.47.1, and haml-lint 0.20.0
1 file checked, 2 offenses detected

app/views/static/notification_drawer/notification-drawer.html.haml

• ⚠️ - Line 26 - Line is too long. [195/160]
• ⚠️ - Line 38 - Do not use semicolons to terminate expressions.

[himdel]

Only the last 4 commits actually change stuff, the rest just brings in stuff from patternfly and cleans it up :).

[simaishi]

Fine backport details:

$ git log -1
commit 542673998dfe010bc32371805ed6df6233edffee
Author: Harpreet Kataria <hkataria@redhat.com>
Date:   Fri Apr 21 17:22:54 2017 -0400

    Merge pull request #611 from himdel/spam-notify
    
    Notifications - fix UI performance with thousands of notifications
    (cherry picked from commit 40eeb17970f77b54679c5937b93f5527a53530c7)

[simaishi]

Euwe backport (to manageiq repo) details:

$ git log -1
commit a3c50981c059d8128c0696e3cb389e67d4f0c225
Author: Harpreet Kataria <hkataria@redhat.com>
Date:   Fri Apr 21 17:22:54 2017 -0400

    Merge pull request #611 from himdel/spam-notify
    
    Notifications - fix UI performance with thousands of notifications
    (cherry picked from commit 40eeb17970f77b54679c5937b93f5527a53530c7)
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1448046