COMMONS-311 [IE8, 9] Problems when sharing a file with accent characters in name

Fix description:
* Store the encoded path of uploaded files to use later in upload process.
COMMONS-268: Incorrect UI of Space Switcher

Fix description:
* Reduce the dropdown's width
* Change the color of Filter space's text
COMMONS-294: Not show all spaces and scrollbar with more than 10 spaces

Fix description:
* When there are more than 10 spaces, a scroll bar will appear
* Remove the blank box at the bottom for the case without scroll bar
Merge commit '8484891a03b69984750b6b3127d194bf681e5867' into HEAD