[nrfconnect] Fixed window app setting value issue.

[kkasperczyk-no]

Setting the position in other states than moving or open/close is not correctly handled, what leads to setting null position and bricking the algorithm, so changing the position is not possible anymore

Added properly handling the case that position doesn't change.

[github-actions]

PR #25243: Size comparison from cad990f to 830b853

Full report (1 build for cc32xx)

platform	target	config	section	cad990f	830b853	change	% change
cc32xx	lock	CC3235SF_LAUNCHXL		0	0	0	0.0
			(read only)	642545	642545	0	0.0
			(read/write)	203664	203664	0	0.0
			.ARM.attributes	44	44	0	0.0
			.ARM.exidx	8	8	0	0.0
			.bss	197064	197064	0	0.0
			.comment	194	194	0	0.0
			.data	1480	1480	0	0.0
			.debug_abbrev	930168	930168	0	0.0
			.debug_aranges	87272	87272	0	0.0
			.debug_frame	299752	299752	0	0.0
			.debug_info	20254060	20254060	0	0.0
			.debug_line	2655143	2655143	0	0.0
			.debug_loc	2795383	2795383	0	0.0
			.debug_ranges	281592	281592	0	0.0
			.debug_str	3017876	3017876	0	0.0
			.ramVecs	780	780	0	0.0
			.resetVecs	64	64	0	0.0
			.rodata	105817	105817	0	0.0
			.shstrtab	232	232	0	0.0
			.stab	204	204	0	0.0
			.stabstr	441	441	0	0.0
			.stack	2048	2048	0	0.0
			.strtab	377610	377610	0	0.0
			.symtab	256144	256144	0	0.0
			.text	534604	534604	0	0.0