ZK supports direction RTL "Right to left" but some components render wrongly if we used direction: rtl as css

1- combobox
Problem:
wrong style + comboxpopup appears on wrong place on rtl direction.
Code:
<combobox style="direction:rtl;">
<comboitem label="Simple and Rich" />
<comboitem label="Cool!" />
<comboitem label="Thumbs Up!" />
</combobox>

2- Tabbox
Problem:
left & right buttons "chevron" does not appears correctly in rtl direction and also if you click on one of them will hide all tabs not get next tab.

Code:
<tabbox width="250px" style="direction:rtl;">
<tabs>
<tab label="Tab 1" closable="true"/>
<tab label="Tab 2" closable="true"/>
<tab label="Tab 3" closable="true"/>
<tab label="Tab 4" closable="true"/>
<tab label="Tab 5" closable="true"/>
</tabs>

<tabpanels>
<tabpanel>This is panel 1</tabpanel>
<tabpanel>This is panel 2
The second panel</tabpanel>
<tabpanel>This is panel 3</tabpanel>
<tabpanel>This is panel 4</tabpanel>
<tabpanel>This is panel 5</tabpanel>
</tabpanels>
</tabbox>

3- Grid
Problem:
frozen does not work on rtl direction, it throw error "positive number only"

Code:
<zk>
<grid style="direction:rtl;">
<frozen columns="2" start="1"/>
<columns >
<column label="Author" sort="auto" width="100px"/>
<column label="Title" sort="auto" width="300px"/>
<column label="Publisher" sort="auto" width="600px"/>
<column label="Hardcover" sort="auto" width="400px"/>
</columns>
<rows>
<row>
<label value="Philip Hensher"/>
<label value="The Northern Clemency"/>
<label value="Knopf (October 30, 2008)"/>
<label value="608 pages"/>
</row>
</rows>

</grid>
</zk>