CMB-1023: Slider Component RTL Alignment

Issue
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The `moon.Slider`, `moon.ProgressBar`, and `moon.SimplePicker` controls should have the same layout in RTL mode as in LTR mode.

Fix
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Remove the RTL-specific styling and layout changes.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>