Facelift: Tighten up editor

[oittinen]

• Change .Preview_innerContainer side margins to 10px
• Change .Preview_innerContainer top padding to 15px
• Change .Preview_segmentsHeader margin-bottom to 10px
• Change .Segment_oneSegment padding to "2px 5px"
• Change .EditorSidebar_innerContainer margin-right to 15px
• Change .EditorSidebar_editorSidebarContainer padding-top to 5px
• Align logo in top bar with left side of controls
• Change .ActionSidebar_innerContainer margin to "20px 40px 30px 10px"
• Align How to Use link on the right with the preview
• Change slider track width to 90% and center it in its container
• Change .Selector_selectorItem height to 24px
• Change .toggleWrapper p bottom margin to 10px
• Change .TextPreview_mirroredContainer top-left and top-right border radius to 10px
• Change .TextPreview_textContainer bottom-left and bottom-right border radius to 10px
• Change .Button_button font-weight to 500
• Change .Preview_segmentsHeader font-weight to 500
• Change .Button_button text-transform to none
• Remove the 8px bottom margin of segments and pauses
• Add a "top: 2px" for .Logo_logoContainer