128x128 Icons: Oxygen Icon Theme, exactly as-is

Replaces all icons that have exact drop-in replacements from the Oxygen
Icon Theme, rendered now at 128x128.
128x128 Icons: Oxygen Icon Theme, with adjustments

Replaces all icons that have approximate replacements from the Oxygen
Icon Theme, rendered now at 128x128. Changes in this set adjust the
original theme by brightening icons, grayscaling, or adding gaps in the
canvas area.
128x128 Icons: Anki Logos

Replaces the Anki logo icons (except for anki-logo-thin.png, which is
not really an icon), rendering them at 128x128 from the source SVGs.
128x128 Icons: Crystal Clear, exactly as-is

Replaces all icons that have exact drop-in replacements from the Crystal
Clear set, rendered now at 128x128.
Browser Toolbar: Set icon size to 16x16

Adjusts the markup injected into the HTML view here to use 16x16 icons.
Utility Tooltips: Use button icon in CustomLabel

Adjusts the CustomLabel class used by the tooltip() function so that it
creates a native push button with an icon set on it so that Qt can scale
down the large icon image to 32x32 and not have it look gritty.