* Gui: Fix preferences search popup positioning on Wayland
Change window flag from `Qt::Tool` to `Qt::ToolTip` to fix popup
appearing in center of screen and closing immediately on Wayland desktop
envs. `Qt::ToolTip` uses xdg_popup protocol which provides proper
positioning relative to parent window on Wayland.
* Gui: Initialize ok check flag to default in prefs
* Gui: Use ranged for loop where possible in prefs
* Gui: Remove unused variable in preferences controller
* Gui: Use const where possible in prefs search dialog
* Gui: Use static where possible in search prefs dialog
* Gui: Use braced initializer list when returning type in search prefs
* Gui: Use auto in search prefs dialog where possible
* Gui: Do not use else if after return in search prefs dialog
* [pre-commit.ci] auto fixes from pre-commit.com hooks
for more information, see https://pre-commit.ci
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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
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