Use avatars instead of icons in activity view

app/assets/stylesheets/pages/events.scss

@@ -10,10 +10,14 @@
   position: relative;
 
   &.event-inline {
-    .profile-icon {
+    .system-note-image {
       top: 20px;
     }
 
+    .user-avatar {
+      top: 14px;
+    }
+
     .event-title,
     .event-item-timestamp {
       line-height: 40px;
@@ -24,7 +28,7 @@
     color: $gl-text-color;
   }
 
-  .profile-icon {
+  .system-note-image {
     position: absolute;
     left: 0;
     top: 14px;
@@ -128,8 +132,7 @@
     li {
       &.commit {
         background: transparent;
-        padding: 3px;
-        padding-left: 0;
+        padding: 0;
         border: none;
 
         .commit-row-title {
@@ -183,7 +186,7 @@
       max-width: 100%;
     }
 
-    .profile-icon {
+    .system-note-image {
       display: none;
     }
 

app/views/events/event/_common.html.haml

-- if event.target
+- if current_path?('dashboard#activity')
+  .system-note-image.user-avatar
+    = author_avatar(event, size: 32)
+- else
+  - if event.target
     - if event.action_name == "opened"
-    .profile-icon.open-icon
+      .system-note-image.open-icon
         = custom_icon("icon_status_open")
     - elsif event.action_name == "closed"
-    .profile-icon.closed-icon
+      .system-note-image.closed-icon
         = custom_icon("icon_status_closed")
     - else
-    .profile-icon.fork-icon
+      .system-note-image.fork-icon
         = custom_icon("icon_code_fork")
 
 .event-title

app/views/events/event/_created_project.html.haml

-.profile-icon.open-icon
+- if current_path?('dashboard#activity')
+  .system-note-image.user-avatar
+    = author_avatar(event, size: 32)
+- else
+  .system-note-image.open-icon
     = custom_icon("icon_status_open")
 
 .event-title

app/views/events/event/_note.html.haml

-.profile-icon
+- if current_path?('dashboard#activity')
+  .system-note-image.user-avatar
+    = author_avatar(event, size: 32)
+- else
+  .system-note-image
     = custom_icon("icon_comment_o")
 
 .event-title

app/views/events/event/_push.html.haml

 - project = event.project
 
-.profile-icon
+- if current_path?('dashboard#activity')
+  .system-note-image.user-avatar
+    = author_avatar(event, size: 32)
+- else
+  .system-note-image
     - if event.action_name == "deleted"
       = custom_icon("trash_o")
     - else