Read settings only, if no args are given

Previously, settings were read and passed as default value, in case no explicit
args of specified name were given. Now read settings only on demand.

Author: deathaxe

latextools/jumpto_pdf.py

@@ -85,8 +85,12 @@ def run(self, **args):
             return
 
         # Check prefs for PDF focus and sync
-        keep_focus = args.get("keep_focus", get_setting("keep_focus", True, view))
-        forward_sync = args.get("forward_sync", get_setting("forward_sync", True, view))
+        keep_focus = args.get("keep_focus")
+        if keep_focus is None:
+            keep_focus = get_setting("keep_focus", True, view)
+        forward_sync = args.get("forward_sync")
+        if forward_sync is None:
+            forward_sync = get_setting("forward_sync", True, view)
 
         # If invoked from keybinding, we sync
         # Rationale: if the user invokes the jump command, s/he wants to see