Support issue-id plugin

Resolves #124
http://projects.andriylesyuk.com/project/redmine/issue-id

src/sass/components/_list.scss

@@ -50,13 +50,17 @@ table.list {
     }
 
     &.id,
+    &.issue_id,
+    &.legacy_id,
     &.parent,
     &.relations,
     &.tracker {
       width: 2%;
     }
 
-    &.id {
+    &.id,
+    &.issue_id,
+    &.legacy_id {
       font-weight: $font-weight-bold;
     }
 
@@ -81,10 +85,6 @@ table.list {
       }
     }
 
-    &.id {
-      text-align: right;
-    }
-
     &.activity,
     &.assigned_to,
     &.attachments,
@@ -108,6 +108,8 @@ table.list {
       text-align: left;
     }
 
+    &.id,
+    &.legacy_id,
     &.estimated_hours,
     &.float,
     &.int,
@@ -384,6 +386,8 @@ tr.entry {
 
 @if $color-trackers {
   tr.issue .id > a,
+  tr.issue .issue_id > a,
+  tr.issue .legacy_id > a,
   a.issue,
   .relations > span > a.issue,
   .parent > a.issue {
@@ -432,7 +436,8 @@ tr.entry {
     }
   }
 
-  tr.issue .id > a {
+  tr.issue .id > a,
+  tr.issue .legacy_id > a {
     display: block;
     padding: $tracker-list-padding;
 
@@ -442,6 +447,11 @@ tr.entry {
     }
   }
 
+  tr.issue .issue_id > a {
+    display: inline-block;
+    padding: $tracker-list-padding;
+  }
+
   @each $tracker-id, $tracker-colors in $tracker-colors-map {
     @include tracker(
       ".tracker-#{$tracker-id}",

src/sass/mixins/_issues.scss

@@ -27,6 +27,7 @@
 
 @mixin tracker($parent, $background, $color) {
   tr#{$parent} .id > a,
+  tr#{$parent} .issue_id > a,
   a#{$parent},
   .relations > span > a#{$parent},
   .parent > a#{$parent} {