Moved menu button to left of file filter in top toolbar
Change main menu icon to the standard one
Combine "search" & "more search" icons in a single SVG
Fix positioning/resizing problems in prev. commit + cleanups
Merge remote-tracking branch 'upstream/master' into menu-button
Add hoverStyle attr to <spark-button>
Use new built-in hoverStyle to customize search mode button
Merge pull request #3129 from ussuri/menu-button

Menu button on the left + standard menu icon