Allow disabling splitter resize client to server invocations

[iotalambda]

Fixes #1506. By setting ClientToServerInvocationsOnPaneResize = false, both the freezing problem and infinite memory consumption are gone and splitters resize smoothly, even if the render mode is interactive, there's network lag and there's complex content on the panes.

[enchev]

Hey @iotalambda,

I'm unable to reproduce such problem:

The change added to 4.27.0 was the StateHasChanged() invoke on resize which will recreate the panes content and this indeed might have performance hit depending on what you have. I'm not sure however that disabling this invoke is the proper solution and honestly I don't like the name ClientToServerInvocationsOnPaneResize. Maybe ChangePaneStateOnResize will be a better name.

[iotalambda]

@enchev Hi, instead of this PR, I decided to implement a fully client side version of RadzenSplitter (with styling from the original splitter), so that all clicks and drags are handled in the client-side only, and it seems to solve the problem even better. I'm quite sure the lagginess occurs only if there's complex data on the panes and also some network latency. In case you want to introduce the fully client side alternative to the library, I can probably create a PR for it at some point.