client/css: adjust thumbnail margins

client/css/comments.styl

@@ -68,7 +68,6 @@
         .thumbnail
             width: 40px
             height: 40px
-            margin: 0
         a
             display: inline-block
 
@@ -172,7 +171,6 @@
                 .thumbnail
                     width: 12em
                     height: 8em
-                    margin: 0
                 a
                     display: inline-block
 

client/css/home.styl

@@ -41,3 +41,5 @@
         font-size: 80%
         .sep
             margin: 0 0.25em
+    .thumbnail
+        margin-right: 0.4em

client/css/main.styl

@@ -177,7 +177,6 @@ a .access-key
         height: 100%
     width: 20px
     height: 20px
-    margin: 0 0.4em 0 0.4em
 
 .flexbox-dummy
     height: 0 !important

client/css/post-upload.styl

@@ -38,7 +38,7 @@
                 float: left
                 width: 12.5em
                 height: 7em
-                margin: 0 1em 0 0
+                margin: 0.2em 1em 0 0
 
             .remove
                 float: right

client/css/posts.styl

@@ -131,7 +131,6 @@ $safety-unsafe = #F3985F
                 background-position: 50% 30%
                 width: 100%
                 height: 100%
-                margin: 0
                 outline-offset: -3px
 
             &:hover
@@ -264,7 +263,6 @@ $safety-unsafe = #F3985F
             background-position: 50% 30%
             width: 4em
             height: 3em
-            margin: 0
         li
             margin: 0 0.3em 0.3em 0
             display: inline-block

client/css/snapshots.styl

@@ -19,7 +19,7 @@ $snapshot-merged-background-color = #FEC
             div
                 padding: 0.1em 0.5em
                 .thumbnail
-                    margin-left: 0
+                    margin: 0 0.4em 0 0
                 &:empty
                     padding: 0
 

client/css/users.styl

@@ -91,7 +91,7 @@
     .thumbnail
         width: 3em
         height: 3em
-        margin: 0 0.6em 0 0
+        margin: 0.25em 0.6em 0 0
 
 .user-list-header
     label