0.13.0 UI cleanup tracking issue

[alexwykoff]

• Any related issues:
  (#6183) Regression : Alignment off for about:about
  (#6137) Fa-icons on about pages are not aligned consistently
  (#5594) newtab - Have default top sites available
  (#5638) about:newtab appears on the top sites list
  (#5978) increase tabs height by 3 px
  (#5772) Font-size of select element inside braveryControlGroup should be set to 13px
  (#5665) Hover background of bookmark bar items is hard to see
  (#6082) Yandex favicon is 404 on about:preferences#search
  (#3648) Favicons Only Behavior Now Leaves Blanks when there is no favicon
  (#2075) bookmark is invisible if favicon.ico is not found
  (#5455) Favicons need onerror handler (as seen in about:newtab)
  (#5776) Newtab should not have an empty favicon
  (#5774) Magnifying glass icon shown for pdf documents opened in Brave
  (#5682) Create "Empty New Tab" option in General Settings
  (#5764) about:blank shows chrome-extension in navigation button history
  (#5953) Edit Bookmark close icon needs hover color
  (#5894) "Remove Bookmark" button hard to read on hover
  (#5632) Bookmark icon is not properly aligned with URL Bar
  (#3207) Middle click on a bookmark link opens tab in the background
  (#5701) Ad control for first time opened private tab doesn't work properly
  (#5664) transition of every button in #navigator
  (#5744) Findbar text selection
  (#5765) About pages right click context menu has an extra separator
  (#5860) Import browser data switches misaligned
  (#5760) Plugin settings info icons are misaligned
  (#5801) Make button styles consistent
  (#6012) document.l10n is sometimes undefined
  (#5192) width of input and select elements on new bookmark folder form is not equal
  (#6004) fix bookmark hanger to have 250px min width, and right-align buttons
  (#6003) adjust fonts in prefs and other about pages to use helv neue on mac, and arial on win
  (#5759) Links to external URLs in the UI should have tooltips
  (#5796) Add drop down options to reload button
  (#6070) Replace close button on downloadBar with SVG button
  (#6270) urlbarIcon size change with search engine selection
  (#6676) Tracking: Replaced the button on the modal dialog with the SVG icon
  (#6675) Tracking: follow-up button styles consistent
  (#6644) Fix URL bar autocomplete flashing as you type
  (#6384) Setting min-width for buttons (l10n-friendly)

[luixxiul]

I removed #6300, #6257, #6281, #5936, #6233, #5928, #5925, #6252 and #6036

[luixxiul]

I removed #5624 as I reopened the issue.