* maint: (38 commits)
git-gui: Changed blame header bar background to match main window
git-gui: Favor the original annotations over the recent ones
git-gui: Improve our labeling of blame annotation types
git-gui: Use three colors for the blame viewer background
git-gui: Jump to original line in blame viewer
git-gui: Display both commits in our tooltips
git-gui: Run blame twice on the same file and display both outputs
git-gui: Display the "Loading annotation..." message in italic
git-gui: Rename fields in blame viewer to better descriptions
git-gui: Label the uncommitted blame history entry
git-gui: Switch internal blame structure to Tcl lists
git-gui: Cleanup redundant column management in blame viewer
git-gui: Better document our blame variables
git-gui: Remove unused commit_list from blame viewer
git-gui: Automatically expand the line number column as needed
git-gui: Make the line number column slightly wider in blame
git-gui: Use lighter colors in blame view
git-gui: Remove unnecessary space between columns in blame viewer
git-gui: Remove the loaded column from the blame viewer
git-gui: Clip the commit summaries in the blame history menu
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