Bug 138901

Description:
In our company we use the extension "Wollmux" which creates it's own tabs in the sidebar. Some buttons on these tabs can change their text, as we can define different senders for a letter, so changing the current means changing the text on the button. If the sender has a short name, the text doesn't exceed the button's width and there is no tooltip, if mouse is over the button. But a sender with a long name exceeds the width and the name is shown cutted. If the mouse moves over the button a tooltip will be popup, so we get still whole name. The problem is, that the tooltip is calculated only once, after a change of the name, the tooltip isn't updated.

Steps to Reproduce:
1.Install "Wollmux" from wollmux.org
2.In the sidebar activate the tab "WollMux"
3.Under Extras->Absenderdaten define at least one sender with short names and one with very long names
4.Below are some buttons, the first button displays the current sender. See if there is a tooltip. Initially there shouldn't be a tooltip if the sender's name is short, in this case select a sender with long name, so a tooltip is shown now. 
5.Now select the short name.


Actual Results:
Although not selected the long name is still shown as tooltip.

Expected Results:
After changing the text of the button, the tooltip should be updated. If the new text is short enough to be displayed on the button, there should be no tooltip at all, if it is another long text, that does exceed the buttons width, the content of the tooltip should be updated.


Reproducible: Always


User Profile Reset: No



Additional Info:
Version: 7.2.0.0.alpha0+ (x64)
Build ID: e5e3a05f13f47d44276cfe8d88e8ec9d4d559a66
CPU threads: 4; OS: Windows 10.0 Build 18363; UI render: default; VCL: win
Locale: de-DE (de_DE); UI: de-DE
Calc: threaded