Dropdownlist is now more similar to the other widgets

unsigned width and height. List-options are not initialized if the vector is empty. Also marked some functions as const in dropdownlist and textinput

added 1 commit

• e04fb1f4 - renamed getValue to getSelectedValue

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added 1 commit

• aedab248 - actually check the size of initialoptions

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Biggest change here is the renaming from getValue to getSelectedValue.

requested review from @bartiver

added 2 commits

• 7a3ddf60 - initialise is now initialize
• 10103d90 - argument types in textinput are now compatible

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merged

mentioned in commit 1564517f