Deletes src/action_buttons.{h,cpp} and tests/test_action_buttons.cpp;
removes the static library, test target, and reaper_reasampler link
entry from CMakeLists.txt; scrubs all dangling comment references.
Button faces now show only the short label (keybinding moved to hover tooltip as
"name — binding"). Cancel RT joins the overflow menu alongside Capture RT. Re-capture
sits between the capture and placement clusters. Toolbar heights 40->28.
New pure action_bar module (clusters, keybinding sub-labels, overflow, hit-test) supersedes the flat M11 strip; bank_panel chrome/buttons/tabs/grid now draw through the L1 kit by role with hover. Expose draw_kit::toLice in header to fix drawThumbnail forward-refs. CTest 27/27.
daniel