Hi SAP BIBO,
1) Kindly note, even if you just drag "Combo Box" & "List View" components in the canvas and check the Mobile Compatibility you will get exactly the above messages.
2) The messages marked in yellow exclamation are warnings. They are warning you that "certain features would not work in Mobile mode". You will have to either live with it OR use some other component.
3) Talking about the Combo Box component :
Say you have 5 values associated with it : Sachin, Rahul, Sourav, Laxman, Lara
Let "Number of Labels Displayed" be set to 2
Let "List Transparency" be set to 100%
3.1) Now, when you preview the dashboard in DESKTOP mode, you will see below
Note : You can see that just 2 values out of 5 are displayed at a time. Also, The borders of the dropdown are not visible as "List transparency" has been set to 100 %
3.2) Now, when you preview the dashboard in Mobile mode, you will see below
Note : But here in Mobile Mode, the "Number of Labels Displyed" setting is not reflecting. We can see all the labels together. Also, the borders of the dropdown are also visible eventhough the "List Transparency" is set to 100%
4) Similarly, for List View component, Setting of "Symbol Color" will have no impact in MOBILE MODE, as it is not supported.
4) Thus, we can see that the warnings are just letting us know that these features would not work in MOBILE MODE.You will have to either live with it OR use some other component.
Hope the above answers your query.
Do let me know in case you have any queries.
Regards,
Monish