Problem: When creating floating window from existing window, the
window-local 'statusline' option is inherited, causing unwanted
statusline display. Additionally, with laststatus=3 (global statusline),
the early return skipped clearing wp->w_redr_status flag.
Solution: Clear inherited window-local 'statusline' in win_new_float
for style="minimal". Restructure win_redr_status to always clear the
flag before any early returns, and only render floating window statusline
when window-local 'statusline' is explicitly set. And respect 'laststatus'
option.
31c814a0ed