[IMP] attachment_preview: Split screen

attachment_preview/static/src/less/attachment_preview.less

@@ -0,0 +1,56 @@
+.o_cp_sidebar {
+    li .o_sidebar_preview_attachment {
+        position: absolute;
+        top: 5px;
+        right: 26px;
+        background-color: #FFF;
+
+        &.o_sidebar_preview_attachment_new_tab {
+            right: 43px;
+        }
+    }
+
+    .open .dropdown-menu > li > a {
+        padding-right: 60px;
+    }
+}
+
+.o_form_uri .fa-search {
+    padding-left: 5px;
+    padding-right: 5px;
+}
+
+/* Preview widget */
+
+.o_form_view.attachment_preview {
+    width: 60%;
+    float: left;
+}
+
+.o_form_view + .attachment_preview_widget {
+    width: 40%;
+    height: 100%;
+    float: right;
+    position: relative;
+
+    > .attachment_preview_iframe {
+        width: 100%;
+        height: calc(~"100% - 30px");
+        float: left;
+    }
+
+    .attachment_preview_buttons {
+        padding: 4px;
+        float: left;
+        width: 100%;
+        background-color: #FFF;
+        border-left: 1px solid @gray-lighter-dark;
+
+        button {
+            min-width: 25px;
+            min-height: 25px;
+            padding-top: 2px;
+            padding-bottom: 2px;
+        }
+    }
+}