Vcs: Distribute readSettings() calls to individual settings

Isn't a benefit here, but what the other settings do, so it's easier
to ponder more centralized solutions later.

Change-Id: I3837e5bedc8771dd56b8bacda8c23e40281b4fe3
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/git/gitsettings.cpp

@@ -145,6 +145,8 @@ GitSettings::GitSettings()
     });
     connect(&binaryPath, &BaseAspect::changed, this, [this] { tryResolve = true; });
     connect(&path, &BaseAspect::changed, this, [this] { tryResolve = true; });
+
+    readSettings();
 }
 
 FilePath GitSettings::gitExecutable(bool *ok, QString *errorMessage) const