overlay: help tooltip updates (#279)

## Link to GitHub Issue, if one exists
n/a

## Description of change

In Options (and in Advanced/API/Search tabs), remove the help marker
`(?)` and instead add a tooltip to the option name label and the control
widgets like the checkbox, text input, and combo. This is to help with
discoverability as many users failed to discover the `(?)` widget.

Similarly, update the Patches tab to remove `(?)` and add tooltips to
widgets. Patches with warnings `(!)` will continue to show it to
distinguish it from other patches.

Update styling for the tooltip (dark red background -> dark gray) so
that it stands out from other widgets.

Remove the purple option text used for game-specific options.

## Compiling
👍 

## Testing
Tested in spicecfg, and in-game overlay.

src/spice2x/overlay/windows/patch_manager.h

@@ -142,6 +142,7 @@ namespace overlay::windows {
             std::function<bool(const PatchData&)> filter = std::function<bool(const PatchData&)>(),
             std::string pe_identifier_for_patch = "");
 
+        void show_patch_tooltip(const PatchData& patch);
     };
 
     PatchStatus is_patch_active(PatchData &patch);