made assert match actual error condition for list iterators

reviewed by Leslie

EXP-1525 FIXED Potential fix for a crash at shutdown: added some error handling to saving inventory cache.

* Fixed build window to not fail assert at construction time.

- Got rid of confusing conditions.

fixed case where adding text between 2 consecutive newlines created gibberish

- Visibility state of chat floater is saved between sessions
- Also visibility state of chat history in nearby chat floater is saved too

EXP-1593 FIXED Navbar was displayed after exitting hide contorls mode, even if disabled via settings.

Apparently, the way we showed/hid the panels was wrong.

EXP-1624 FIXED ([TRANSLATED BUT IN EN] tooltip for chat floater in English: Shows/hides nearby chat log)

Reason:
- Panel name was missed in other locales.

Solution:
- Added panel name to other locales.

- Removed duplicated parameters

- Adjusted width of "shop" button in all locales. Had to override width parameter in xml files of all locales. If to set one value with extra room space for all locales it will look rather ugly for many locales including EN.

EXP-1744 FIXED URL-like group display name was shown as hyperlink in the Leave Group confirmation dialog.

EXP-1632 FIXED Added checking for valid agent avatar before selecting the avatar gender and loading the initial outfit.

EXP-1693 FIXED the date localization in Item Profile window, Voice Morphs window and in scroll list widget in general.
- Added a customizable date format string to be used for scroll list cell of "date" type.
- The date localization does not change the value of a scroll list cell changing only its string representation.
- Added using localized week days and month names from strings.xml for all locales not only Ja and Pl as it was before.
- Changed the date format in Item Profile window (French locale) as noted in the issue description.
- For this fix the French locale still needs the localization of the following strings in strings.xml:
	<string name="dateTimeWeekdaysNames">
	<string name="dateTimeWeekdaysShortNames">
	<string name="dateTimeMonthNames">
	<string name="dateTimeMonthShortNames">
	<string name="dateTimeDayFormat">
	<string name="dateTimeAM">
	<string name="dateTimePM">

The crash happened if connection timed out while there were unread object inventory offers.