Keep blocks static relative to the right edge in RTL mode
Keep blocks static relative to the right edge in RTL mode

This also fixes initial positioning in RTL mode because block position is
corrected during the initial resize of the #blockly div.

rvarshney/code-dot-org,rvarshney/code-dot-org,dillia23/code-dot-org,bakerfranke/code-dot-org,pickettd/code-dot-org,ty-po/code-dot-org,pickettd/code-dot-org,ty-po/code-dot-org,bakerfranke/code-dot-org,ty-po/code-dot-org,cloud3edu/code-dot-org-old,pickettd/code-dot-org,cloud3edu/code-dot-org-old,dillia23/code-dot-org,dillia23/code-dot-org,pickettd/code-dot-org,pickettd/code-dot-org,ty-po/code-dot-org,bakerfranke/code-dot-org,dillia23/code-dot-org,ty-po/code-dot-org,rvarshney/code-dot-org,pickettd/code-dot-org,dillia23/code-dot-org,bakerfranke/code-dot-org,bakerfranke/code-dot-org,dillia23/code-dot-org,rvarshney/code-dot-org,rvarshney/code-dot-org,bakerfranke/code-dot-org,ty-po/code-dot-org,pickettd/code-dot-org,cloud3edu/code-dot-org-old,dillia23/code-dot-org,rvarshney/code-dot-org,rvarshney/code-dot-org,cloud3edu/code-dot-org-old,cloud3edu/code-dot-org-old,dillia23/code-dot-org,rvarshney/code-dot-org,ty-po/code-dot-org,cloud3edu/code-dot-org-old,bakerfranke/code-dot-org,cloud3edu/code-dot-org-old,ty-po/code-dot-org,pickettd/code-dot-org