Fix tooltip bug when content is null

[delprzemo]

This PR fixes page crash when content is null for tooltip

[DustyTheBot]

	Fails
🚫	All of your entries in CHANGELOG.md should be in the **Unreleased** section!

Perf comparison

Status	Scenario	Fluent TPI	Fabric TPI	Ratio	Iterations	Ticks
🔧	Avatar.Fluent	0.57	0.39	1.46:1	2000	1136
🔧	Button.Fluent	1.3	0.17	7.65:1	1000	1299
🔧	Checkbox.Fluent	1.39	0.3	4.63:1	1000	1387
🔧	Dialog.Fluent	0.33	0.16	2.06:1	5000	1658
🔧	Dropdown.Fluent	3.42	0.37	9.24:1	1000	3420
🔧	Icon.Fluent	0.23	0.03	7.67:1	5000	1154
🔧	Image.Fluent	0.1	0.07	1.43:1	5000	475
🔧	Slider.Fluent	1.81	0.28	6.46:1	1000	1805
🔧	Text.Fluent	0.05	0.02	2.5:1	5000	227
🦄	Tooltip.Fluent	0.18	16.83	0.01:1	5000	897

🔧 Needs work     🎯 On target     🦄 Amazing

Perf tests with no regressions

Scenario	Current PR Ticks	Baseline Ticks	Ratio
TextMinimalPerf.default	295	246	1.2:1
ChatDuplicateMessagesPerf.default	786	691	1.14:1
AnimationMinimalPerf.default	638	579	1.1:1
MenuButtonMinimalPerf.default	1977	1830	1.08:1
Button.Fluent	1299	1207	1.08:1
Checkbox.Fluent	1387	1287	1.08:1
LayoutMinimalPerf.default	664	625	1.06:1
SplitButtonMinimalPerf.default	13515	12722	1.06:1
ToolbarMinimalPerf.default	721	681	1.06:1
TreeMinimalPerf.default	962	909	1.06:1
Dialog.Fluent	1658	1574	1.05:1
ButtonSlotsPerf.default	2434	2348	1.04:1
CarouselMinimalPerf.default	2475	2380	1.04:1
ListCommonPerf.default	1411	1353	1.04:1
MenuMinimalPerf.default	2486	2388	1.04:1
ProviderMergeThemesPerf.default	1457	1407	1.04:1
SegmentMinimalPerf.default	1690	1619	1.04:1
AvatarMinimalPerf.default	802	775	1.03:1
PopupMinimalPerf.default	439	425	1.03:1
RefMinimalPerf.default	201	195	1.03:1
TableMinimalPerf.default	717	696	1.03:1
BoxMinimalPerf.default	274	269	1.02:1
DialogMinimalPerf.default	2152	2115	1.02:1
DropdownManyItemsPerf.default	617	602	1.02:1
HeaderMinimalPerf.default	522	512	1.02:1
SliderMinimalPerf.default	2359	2304	1.02:1
TextAreaMinimalPerf.default	3400	3346	1.02:1
FlexMinimalPerf.default	417	411	1.01:1
HierarchicalTreeMinimalPerf.default	1019	1009	1.01:1
IconMinimalPerf.default	1433	1412	1.01:1
ProviderMinimalPerf.default	754	743	1.01:1
ReactionMinimalPerf.default	3245	3209	1.01:1
Image.Fluent	475	470	1.01:1
AttachmentSlotsPerf.default	4635	4647	1:1
ChatMinimalPerf.default	2161	2154	1:1
DropdownMinimalPerf.default	4682	4679	1:1
InputMinimalPerf.default	1202	1201	1:1
ItemLayoutMinimalPerf.default	2101	2102	1:1
AttachmentMinimalPerf.default	1278	1286	0.99:1
DividerMinimalPerf.default	1146	1161	0.99:1
GridMinimalPerf.default	1024	1039	0.99:1
HeaderSlotsPerf.default	1635	1658	0.99:1
LabelMinimalPerf.default	2168	2197	0.99:1
Text.Fluent	227	230	0.99:1
CheckboxMinimalPerf.default	8706	8927	0.98:1
EmbedMinimalPerf.default	7933	8055	0.98:1
Avatar.Fluent	1136	1163	0.98:1
Slider.Fluent	1805	1834	0.98:1
ListMinimalPerf.default	875	910	0.96:1
AlertMinimalPerf.default	739	781	0.95:1
CustomToolbarPrototype.default	3789	4000	0.95:1
ImageMinimalPerf.default	629	671	0.94:1
PortalMinimalPerf.default	296	315	0.94:1
Icon.Fluent	1154	1231	0.94:1
ChatWithPopoverPerf.default	750	806	0.93:1
RadioGroupMinimalPerf.default	503	543	0.93:1
VideoMinimalPerf.default	739	814	0.91:1
FormMinimalPerf.default	934	1034	0.9:1
ButtonMinimalPerf.default	1742	1951	0.89:1
AccordionMinimalPerf.default	241	278	0.87:1
Dropdown.Fluent	3420	3912	0.87:1
LoaderMinimalPerf.default	2714	3165	0.86:1
StatusMinimalPerf.default	964	1141	0.84:1
TooltipMinimalPerf.default	1282	2284	0.56:1
Tooltip.Fluent	897	1820	0.49:1

Generated by 🚫 dangerJS

[jurokapsiar]

@delprzemo looks good to me, please update to master and verify if changelog entry gets to the right place (unreleased)

[delprzemo]

@delprzemo looks good to me, please update to master and verify if changelog entry gets to the right place (unreleased)

@jurokapsiar Great :) Branch updated to master - changelog entry in the unreleased section. I don't have write access so could you merge it?

[layershifter]

So, fix for this was merged in #2332. Closing.