Revert "[SSE] Special-paste button was over drop-down menus (left menu or menus in the toolbar)."

This reverts commit 64044dae.

apps/spreadsheeteditor/main/app/controller/DocumentHolder.js

@@ -1624,7 +1624,7 @@ define([
                 me._arrSpecialPaste[Asc.c_oSpecialPasteProps.sourceformatting] = me.txtPasteSourceFormat;
                 me._arrSpecialPaste[Asc.c_oSpecialPasteProps.destinationFormatting] = me.txtPasteDestFormat;
 
-                pasteContainer = $('<div id="special-paste-container" style="position: absolute;"><div id="id-document-holder-btn-special-paste"></div></div>');
+                pasteContainer = $('<div id="special-paste-container" style="position: absolute; z-index: 10000;"><div id="id-document-holder-btn-special-paste"></div></div>');
                 documentHolderView.cmpEl.append(pasteContainer);
 
                 me.btnSpecialPaste = new Common.UI.Button({

apps/spreadsheeteditor/main/resources/less/toolbar.less

@@ -261,7 +261,7 @@
 
 #special-paste-container {
     position: absolute;
-    z-index: @zindex-dropdown - 10;
+    z-index: 100;
     background-color: @gray-light;
     border: 1px solid @gray;
 }
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