تحميل Executor 2.1.3

### Improvements

- Import/export dialog had a "redesign", adding a couple more buttons for bulk
selection and rearranged some elements.
- If clicking "cancel" in import/export dialog, the keyword editor will only be
displayed afterwards if the dialog was started from the keyword editor.
- You can now press Shift+F2 (most places) to end the Internal browser (when
loaded) to unload it from memory. This is just like using the browserend
keyword (based on the $BROWSEREND$ command).
- The "Always align to the center of the screen" setting was previously limited
to the primary display, it now has a lot of options. See Settings > General >
"Auto center window".
- Various settings adjustments and text updates, added various mouse over hints.
Some settings have been rearranged for a more logical order.

### Fixes

- Fixed an issue with external WebViews not being unloaded when closed.
- Fixed an issue where a WebView could cause a "Cannot focus a disabled or
invisible window." error message.
- Fixed that focusing an external WebView would also recall Executor window when
hidden.
- Fixed a problem with some dialogs (like the permissions dialog) not being in
foreground when the "Always on top" Window setting is enabled. Also renamed
the "Always on top" Window setting to better reflect it's forceful/glitchy
nature. It's not really recommended using this setting unless you have other
apps blocking Executor from getting focus somehow.