Werk #11918: Fix default value of "Number of columns" in display options of views

Component	User interface
Title	Fix default value of "Number of columns" in display options of views
Date	Jan 19, 2021
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.1.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 2.0.0b5 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

The default value was always "1" but should be the same as the property of the currently viewed view.

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