design polish on a few items in /files

Fixes: CNVS-28841

test plan:
- as a user with the new ui
- click the "account" link from the left nav
- from the sub-nav click "files"
- if you do not have any items uploaded - do so
  in order to click an item and see the action
  buttons groupset... a few tweaks have been
  made to bring it inline with products design
  example: http://screencast.com/t/QA6E3u5u
- next click into a course and from the course
  sub-nav click "files" - the tweaks from above
  should be viewable on this page as well
  example: http://screencast.com/t/85IoRnYwlpiE

note:
- a comment has been left on the jira regarding
  the odd course sub-nav placement for files
  within a course *** wil need to be addressed
  on a new ticket/commit

Change-Id: I49cae6c4057e44076ce9cae0489f02c065927f85
Reviewed-on: https://gerrit.instructure.com/77893
Tested-by: Jenkins
Reviewed-by: Chris Hart <chart@instructure.com>
Product-Review: Chris Hart <chart@instructure.com>
QA-Review: Myller de Araujo <myller@instructure.com>

Author: pamhiett

app/jsx/files/Toolbar.jsx

@@ -38,7 +38,7 @@ define([
             className='btn btn-add-folder'
             aria-label= {I18n.t('Add Folder')}
           >
-            <i className='icon-plus' />
+            <i className='icon-plus' />&nbsp;
             <span className= {phoneHiddenSet} >
               {I18n.t('Folder')}
             </span>
@@ -113,7 +113,7 @@ define([
           aria-label= {I18n.t('Move')}
           dataTooltip= ''
         >
-          <i className='icon-copy-course' />
+          <i className='icon-updown' />
         </button>
       );
     }

app/jsx/files/UploadButton.jsx

@@ -48,12 +48,12 @@ define([
         <button
           type= 'button'
           className= 'btn btn-primary btn-upload'
-          ariaLabel= {I18n.t('upload', 'Upload')}
+          ariaLabel= {I18n.t('Upload')}
           onClick= {this.handleAddFilesClick}
         >
-          <i className='icon-upload'/>
+          <i className='icon-upload'/>&nbsp;
           <span className= {this.hiddenPhoneClassname()} >
-            { I18n.t('upload', 'Upload') }
+            { I18n.t('Upload') }
           </span>
         </button>
         { this.buildPotentialModal() }

app/stylesheets/pages/react_files/_react_files.scss

@@ -32,13 +32,13 @@ body:not(.with-left-side) & .ic-app-nav-toggle-and-crumbs--files {
   }
 }
 
-.ef-main-buttons{
+.ef-main-buttons {
   .ui-buttonset, .ui-button {
     display: inline-block;
   }
 }
 
-.ef-header{
+.ef-header {
   @if $use_new_styles {
     padding: $ic-sp*2 0 $ic-sp;
     border-bottom: 1px solid $ic-border-light;
@@ -51,7 +51,17 @@ body:not(.with-left-side) & .ic-app-nav-toggle-and-crumbs--files {
     display: flex;
     align-items: center;
   }
-  .ui-buttonset { margin: 0; }
+  .ui-buttonset {
+    margin: 0;
+  }
+  & .ui-button:first-child {
+    border-top-left-radius: $borderRadius;
+    border-bottom-left-radius: $borderRadius;
+  }
+  & .ui-button:last-child {
+    border-top-right-radius: $borderRadius;
+    border-bottom-right-radius: $borderRadius;
+  }
 }
 
 .ef-search-form {
@@ -86,7 +96,7 @@ body:not(.with-left-side) & .ic-app-nav-toggle-and-crumbs--files {
   flex: 1;
   display: flex;
   justify-content: flex-end;
-  > * { margin-left: $ic-sp/4; }
+  > * { margin-left: $ic-sp/3; }
 }
 
 .ef-main{